Glass Bloodfin Tetra

Glass Bloodfin Tetra

Table of Contents


Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, is a fascinating and highly sought-after fish species among aquarium enthusiasts. Its unique characteristics and striking appearance make it a popular choice for both beginner and experienced aquarists.

The common name, Glass Bloodfin Tetra, is derived from its translucent body and the vibrant red coloration of its fins. When viewed under the aquarium lights, the fins resemble droplets of blood, creating a captivating visual display.

What sets the Glass Bloodfin Tetra apart from other fish species is its delicate and ethereal appearance. The transparent body allows for a glimpse into its internal organs, giving it a truly mesmerizing quality. Additionally, the contrasting red fins add a vivid splash of color, making it a standout species in any aquarium.

The Glass Bloodfin Tetra’s popularity among aquarium enthusiasts can be attributed to its peaceful nature and ease of care. It is a hardy species that can adapt well to various water conditions, making it suitable for both beginners and experienced hobbyists. Its small size, reaching an average length of 1.5 inches (3.8 cm), makes it an ideal choice for smaller aquarium setups.

Furthermore, the Glass Bloodfin Tetra is known for its schooling behavior, preferring to live in groups of at least six individuals. This social nature adds a sense of liveliness to the aquarium and allows for the observation of natural schooling behaviors. The interaction between the individuals within the group creates a dynamic and captivating display for the observer.

The Glass Bloodfin Tetra’s peaceful temperament also makes it compatible with a wide range of tank mates. It can coexist harmoniously with other small, non-aggressive fish species, such as tetras, rasboras, and dwarf cichlids. This adaptability and compatibility make it a versatile addition to community aquariums.

In conclusion, the Glass Bloodfin Tetra, with its transparent body, vibrant red fins, and peaceful nature, is a captivating and popular choice among aquarium enthusiasts. Its unique characteristics and ease of care make it an excellent addition to both beginner and experienced aquarists’ collections. By appreciating and considering this fascinating fish for their own aquariums, hobbyists can enhance the beauty and diversity of their aquatic ecosystems.

Taxonomy and Classification

Scientific Classification of Glass bloodfin tetra

Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, belongs to the Animalia kingdom, the Chordata phylum, the Actinopterygii class, the Characiformes order, and the Characidae family. Its scientific name, Prionobrama filigera, reflects its unique characteristics and attributes.

Placement within the Characidae Family

Within the Characidae family, Prionobrama filigera is classified under the subfamily Incertae Sedis, which means it is not specifically assigned to any particular tribe or subfamily within the family. This classification indicates that there is still ongoing research and debate regarding its exact placement within the family.

Notable Sub-species or Variations within the Species

Currently, there are no recognized sub-species or variations within Prionobrama filigera. However, it is important to note that the taxonomy of fish species is constantly evolving as new research and genetic studies provide further insights. As such, future discoveries may reveal previously unknown sub-species or variations within the Glass Bloodfin Tetra.

It is worth mentioning that the Glass Bloodfin Tetra shares some similarities in appearance and behavior with other tetra species, such as the Prionobrama paraguayensis. However, thorough examination and analysis of their morphological and genetic characteristics have determined them to be separate species.

In conclusion, the scientific classification of Prionobrama filigera places it within the Characidae family, specifically under the subfamily Incertae Sedis. While no sub-species or variations have been officially recognized, ongoing research may shed light on further taxonomic distinctions within this captivating species.

Physical Description

General Appearance

The general appearance of Prionobrama filigera is truly captivating. This species showcases a sleek and slender body shape, typical of most tetras. The elongated body is slightly compressed laterally, giving it a streamlined appearance that allows for swift and graceful movements in the water. The average size of an adult Glass Bloodfin Tetra ranges from 2 to 2.5 inches (5 to 6.5 centimeters), making it a relatively small fish that can comfortably fit in most aquarium setups.

Coloration and Fins

The coloration of Prionobrama filigera is where its true beauty shines. The overall body color of this species is a shimmering silver, which gives it a stunning reflective quality when light hits its scales. However, what truly sets the Glass Bloodfin Tetra apart is its transparent fins. The delicate dorsal and anal fins are almost completely transparent, creating a mesmerizing effect as they flutter through the water. This unique feature adds a touch of elegance to this already enchanting fish.

Bloodfin Spot

Another distinctive feature of Prionobrama filigera is the presence of a vivid red spot on its body, located just behind the gill cover. This spot, often referred to as the “bloodfin,” is where the common name of this species originates. The red spot stands out against the silver body, creating a striking contrast that further enhances the visual appeal of this fish. It is believed that this spot serves as a form of communication or identification among individuals of the same species.

Iridescent Sheen and Lateral Line System

Furthermore, upon closer observation, you may notice a subtle iridescent sheen on the scales of the Glass Bloodfin Tetra. This iridescence reflects different colors depending on the angle of light, giving the fish a captivating and ever-changing appearance. This feature adds depth and complexity to its overall coloration, making it a true delight to observe.

In addition to its physical attributes, it is worth noting that Prionobrama filigera possesses a lateral line system, which is a row of sensory organs running along its sides. This lateral line system allows the fish to detect changes in water pressure and vibrations, aiding in navigation and communication within its environment.

Overall, the physical description of Prionobrama filigera showcases a species that is both visually stunning and uniquely adapted to its aquatic habitat. Its sleek body shape, shimmering silver coloration, transparent fins, and the striking red spot make it a true gem in the world of tropical fish. Observing these fascinating features up close is an experience that will undoubtedly captivate any aquarium enthusiast.

Habitat and Distribution

Natural Habitat of Prionobrama filigera

Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, is native to the rivers and streams of South America. It is primarily found in the Amazon River basin, specifically in the countries of Brazil, Peru, and Colombia. Within these regions, it inhabits slow-moving or stagnant waters, including tributaries, flooded forests, and oxbow lakes. These habitats are characterized by dense vegetation, submerged roots, and fallen branches, providing ample hiding places and shelter for the species.

Preferred Water Conditions

Glass Bloodfin Tetras thrive in tropical freshwater environments with specific water conditions. They prefer temperatures ranging from 75°F to 82°F (24°C to 28°C), making them well-suited for heated aquariums. The pH level should ideally be slightly acidic to neutral, ranging from 6.5 to 7.5. As for water hardness, they prefer soft to moderately hard water, with a dGH (degree of general hardness) between 5 and 15.

Maintaining stable water parameters is crucial for the health and well-being of these tetras. It is recommended to use a reliable water testing kit to monitor and adjust the water conditions accordingly. Regular water changes, filtration, and appropriate substrate choices, such as fine gravel or sand, can help replicate their natural habitat and ensure their optimal health.

Distribution Range

The distribution range of Prionobrama filigera extends across various countries in South America. It is primarily found in the Amazon River basin, which spans Brazil, Peru, and Colombia. Within these countries, the species can be found in specific regions, including the Amazonas, Pará, and Acre states in Brazil, Loreto and Ucayali regions in Peru, and the Amazonas and Vaupés departments in Colombia.

In Brazil, the Glass Bloodfin Tetra is commonly encountered in the tributaries of the Amazon River, such as the Rio Negro and Rio Madeira. In Peru, it can be found in the upper Amazon River and its tributaries, including the Marañón and Ucayali rivers. In Colombia, the species is distributed in the Amazonas and Vaupés departments, which are part of the larger Amazon basin.

It is important to note that while Prionobrama filigera has a relatively wide distribution range within South America, its presence may be more localized within specific river systems or regions. This highlights the importance of preserving the diverse habitats and ecosystems of the Amazon basin to ensure the long-term survival of this species and its associated biodiversity.

Overall, the Glass Bloodfin Tetra’s natural habitat and distribution range provide valuable insights into its environmental requirements and the need for conservation efforts to protect its fragile ecosystems. By understanding and appreciating the species’ natural habitat, aquarium enthusiasts can create optimal conditions in captivity and contribute to the preservation of this fascinating fish species.

Behavior and Social Structure

Social Nature and Group Living:

Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, is renowned for its highly social nature and strong preference for living in groups. In the wild, these tetras are often found in large schools, consisting of dozens or even hundreds of individuals. This social behavior is not only fascinating to observe but also serves several important purposes for the species.

Living in groups provides Prionobrama filigera with a sense of security and protection against predators. By forming tight-knit schools, these fish create a collective defense mechanism, making it harder for predators to single out and attack individual members. Additionally, the presence of a larger group allows for better detection of potential threats, as more individuals can keep a watchful eye on their surroundings.

Furthermore, group living also facilitates efficient foraging and navigation. Prionobrama filigera often engage in cooperative feeding behaviors, where they swim together in synchronized patterns to locate and consume food sources. This cooperative behavior not only increases their chances of finding food but also helps them navigate through their natural habitat more effectively.

Behavior Towards Other Fish Species:

Prionobrama filigera exhibits relatively peaceful behavior towards both conspecifics (other members of the same species) and heterospecifics (other fish species). Within their own species, these tetras are known to establish a hierarchy based on size and dominance. However, aggression within the species is generally minimal and limited to minor displays of territoriality during breeding periods.

When it comes to interactions with other fish species, Prionobrama filigera is typically non-aggressive and can coexist peacefully with a wide range of tank mates. Their calm and peaceful nature makes them suitable for community aquariums, where they can be housed with other small, peaceful fish species. However, it is important to consider the size and temperament of potential tank mates to ensure compatibility and minimize any potential conflicts.

Interesting and Unique Behaviors:

Prionobrama filigera exhibits several interesting and unique behaviors that further add to their allure as aquarium fish. One of the most captivating behaviors displayed by these tetras is schooling. When kept in groups, they form tight schools, swimming in perfect unison, creating a mesmerizing display of synchronized movement. This behavior not only enhances the aesthetic appeal of the aquarium but also provides a sense of security and comfort to the fish.

During courtship and breeding periods, Prionobrama filigera engages in fascinating displays of behavior. Males often showcase their vibrant colors and perform intricate courtship dances to attract females. These dances involve impressive fin displays, rapid swimming, and occasional bursts of energetic movements. Witnessing these courtship displays can be a truly captivating experience for aquarium enthusiasts.

In conclusion, Prionobrama filigera is a highly social species that thrives in group living arrangements. Their peaceful nature, cooperative feeding behaviors, and captivating courtship displays make them a fascinating addition to any aquarium. Understanding and appreciating the behavior and social structure of these tetras not only enhances our enjoyment as aquarium enthusiasts but also highlights the importance of providing them with suitable tank mates and environments that mimic their natural habitat.

Feeding Habits

Diet in the Wild:

Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, is an omnivorous species that feeds on a variety of food sources in its natural habitat. In the wild, their diet primarily consists of small invertebrates, such as insects, insect larvae, and small crustaceans. They also consume plant matter, including algae and aquatic vegetation. This diverse diet ensures that they obtain the necessary nutrients for their growth and overall health.

Feeding Behavior and Preferences in Aquarium Settings:

When kept in aquariums, Prionobrama filigera readily adapts to commercial fish foods. They are not picky eaters and will readily accept a variety of dry, frozen, and live foods. In terms of feeding behavior, they are active swimmers and will actively search for food throughout the tank. They are known to explore different levels of the water column, from the surface to the bottom, in search of food particles.

Recommendations for a Balanced and Nutritious Diet for Captive Specimens:

To ensure the optimal health and well-being of captive Prionobrama filigera, it is essential to provide a balanced and varied diet. Here are some recommendations for a nutritious diet:

  1. Dry Foods: High-quality flake or pellet foods specifically formulated for tropical fish should form the staple diet. Look for products that contain a mix of proteins, vitamins, and minerals to meet their nutritional requirements. It is advisable to vary the brand and type of dry food to provide a diverse range of nutrients.
  2. Frozen Foods: Supplementing their diet with frozen foods is highly beneficial. Offer them frozen brine shrimp, bloodworms, daphnia, and other small invertebrates. These foods mimic their natural diet and provide essential proteins and fats.
  3. Live Foods: Prionobrama filigera will greatly benefit from occasional live food offerings. Live brine shrimp, mosquito larvae, and blackworms are excellent choices. These live foods provide enrichment and stimulate their natural foraging instincts.
  4. Vegetable Matter: While primarily omnivorous, including vegetable matter in their diet is important. Offer them blanched spinach, lettuce, or spirulina-based foods. These plant-based foods provide essential fiber and help maintain their digestive health.

It is crucial to feed them small portions multiple times a day rather than one large feeding. This feeding strategy mimics their natural feeding behavior and ensures they receive a consistent supply of nutrients throughout the day. Additionally, always monitor their feeding response and adjust the amount of food accordingly to prevent overfeeding and maintain water quality.

By providing a varied and balanced diet, aquarium enthusiasts can ensure the optimal health, vibrant coloration, and longevity of their Prionobrama filigera specimens. Remember, a well-fed and content fish is a happy fish!

Reproduction and Breeding

Reproductive Strategies of Glass bloodfin tetra

Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, exhibits interesting reproductive strategies that contribute to the species’ survival and success in their natural habitat. These strategies include specific spawning behavior and courtship rituals.

During the reproductive season, which typically occurs during the rainy season in their native South American rivers and streams, male Glass Bloodfin Tetras become more vibrant in coloration and develop elongated fins. This visual display is an important part of their courtship ritual, as males compete for the attention of females.

Process of Egg-Laying and Care for Eggs and Fry

Once a male successfully attracts a female, the pair will engage in a series of courtship displays, including chasing and fin flaring. The male will then lead the female to a suitable spawning site, which is often among fine-leaved plants or submerged vegetation.

The female Glass Bloodfin Tetra will release her eggs, which are adhesive and stick to the chosen substrate. The male will then fertilize the eggs externally. This process may be repeated multiple times, resulting in the deposition of several batches of eggs.

After the spawning process is complete, it is crucial to remove the adult fish from the breeding tank to prevent them from consuming the eggs. The eggs typically hatch within 24 to 48 hours, depending on water conditions.

Once the fry emerge from their eggs, they are initially very small and require microscopic food, such as infusoria or commercially available liquid fry food. As they grow, their diet can be gradually transitioned to finely crushed flakes or baby brine shrimp.

Challenges and Considerations for Breeding Glass bloodfin tetra in Captivity

Breeding Prionobrama filigera in captivity can present some challenges for aquarium enthusiasts. One of the main considerations is providing the appropriate water conditions and environment to mimic their natural habitat.

To encourage successful breeding, it is essential to maintain stable water parameters, including a temperature range of 75-82°F (24-28°C), a slightly acidic to neutral pH level of 6.5-7.5, and moderate water hardness. Additionally, providing ample hiding places, such as dense vegetation or spawning mops, can help create a conducive breeding environment.

Another challenge is the size difference between adult Glass Bloodfin Tetras and their tiny fry. The adults may view the fry as potential prey and may consume them if not separated. To ensure the survival of the fry, it is recommended to transfer them to a separate rearing tank or utilize a breeding net within the main aquarium.

Furthermore, maintaining a well-balanced diet for both the adult fish and the fry is crucial for their overall health and successful breeding. Offering a variety of high-quality foods, including live or frozen options, can help meet their nutritional requirements and promote optimal breeding conditions.

In conclusion, breeding Prionobrama filigera, the Glass Bloodfin Tetra, can be a rewarding but challenging endeavor for aquarium enthusiasts. By understanding their reproductive strategies, providing suitable spawning conditions, and addressing potential challenges, breeders can contribute to the conservation of this fascinating species while enjoying the beauty of their breeding displays and the joy of raising their fry.

Prionobrama filigera in the Aquarium Hobby

Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, has gained immense popularity among aquarium enthusiasts for several compelling reasons. Firstly, its stunning appearance and unique characteristics make it a visually captivating addition to any aquarium. The transparent fins and shimmering silver body of the Glass Bloodfin Tetra create a mesmerizing effect, especially when they swim in groups, reflecting light and adding a touch of elegance to the tank.

Secondly, the Glass Bloodfin Tetra is known for its peaceful and sociable nature, making it an excellent choice for community aquariums. Unlike some other fish species, Prionobrama filigera is generally non-aggressive and can coexist harmoniously with a variety of tank mates. This peaceful temperament allows aquarists to create diverse and vibrant aquatic communities, enhancing the overall aesthetic appeal of the aquarium.

Furthermore, the Glass Bloodfin Tetra is relatively easy to care for, making it suitable for both beginner and experienced aquarists. It adapts well to a wide range of water conditions, including pH levels between 6.0 and 8.0 and temperatures ranging from 72°F to 82°F (22°C to 28°C). This adaptability makes it an ideal choice for aquarists with varying levels of experience and different tank setups.

Discuss its compatibility with other fish species and tank mates.

The Glass Bloodfin Tetra is known for its peaceful nature and is generally compatible with a wide range of fish species and tank mates. Its non-aggressive behavior and small size make it an excellent choice for community aquariums. However, it is important to consider a few factors when selecting tank mates for Prionobrama filigera.

Due to its small size, it is advisable to avoid keeping the Glass Bloodfin Tetra with large or aggressive fish species that may view them as potential prey. Additionally, some fish species with long, flowing fins may mistake the transparent fins of the Glass Bloodfin Tetra for food or potential rivals, leading to fin nipping. Therefore, it is recommended to choose tank mates that are similar in size and temperament to ensure a peaceful coexistence.

Compatible tank mates for the Glass Bloodfin Tetra include other peaceful community fish such as tetras, rasboras, danios, and small catfish species. These fish share similar water parameter requirements and will create a harmonious and visually appealing aquarium environment.

Provide guidelines for setting up an ideal aquarium environment for this species.

To create an ideal aquarium environment for the Glass Bloodfin Tetra, it is important to consider their natural habitat and replicate it as closely as possible. Here are some guidelines to ensure the well-being and comfort of Prionobrama filigera in a home aquarium:

  1. Tank size: Provide a spacious aquarium with a minimum capacity of 20 gallons (75 liters) to accommodate a school of Glass Bloodfin Tetras. The larger the tank, the better, as it allows for more swimming space and reduces territorial disputes.
  2. Water parameters: Maintain a temperature between 72°F and 82°F (22°C to 28°C) and a pH level between 6.0 and 8.0. The water hardness should be kept within the range of 5 to 15 dGH. Regular water testing and appropriate adjustments should be made to ensure optimal conditions.
  3. Lighting and plants: Use subdued lighting to mimic the dappled sunlight found in their natural habitat. Adding live plants, such as Java moss, Amazon sword, or Vallisneria, not only enhances the aesthetics but also provides hiding places and shelter for the Glass Bloodfin Tetras.
  4. Filtration and water flow: Install a reliable filtration system to maintain water quality and provide adequate circulation. The Glass Bloodfin Tetra thrives in well-oxygenated water, so a gentle water flow is recommended.
  5. Tank decor: Incorporate natural elements such as driftwood, rocks, and leaf litter to mimic their native environment. These elements not only provide hiding places but also create visual interest and stimulate natural behavior.
  6. Schooling behavior: Prionobrama filigera is a schooling fish, so it is crucial to keep them in groups of at least six individuals. The presence of a school provides a sense of security and reduces stress levels among the Glass Bloodfin Tetras.

By following these guidelines, aquarists can create an ideal aquarium environment that closely resembles the natural habitat of the Glass Bloodfin Tetra. This will not only ensure the well-being and happiness of these fascinating fish but also provide a visually stunning and harmonious aquatic display.


Throughout this article, we have explored the fascinating world of Prionobrama filigera, commonly known as the Glass Bloodfin Tetra. We have delved into its taxonomy and classification, its physical description, habitat and distribution, behavior and social structure, feeding habits, reproduction and breeding, conservation status, and its popularity among aquarium enthusiasts.

It is crucial to emphasize the importance of understanding and conserving Prionobrama filigera. As a species, it possesses unique characteristics that make it a captivating addition to any aquarium. Its transparent fins and the striking red spot on its body make it a visually stunning fish that can truly enhance the aesthetic appeal of an aquarium.

Beyond its visual appeal, Prionobrama filigera also exhibits interesting behaviors and social structures. It is a social species that prefers living in groups, and its behavior towards other fish species, both within and outside its own species, adds to its allure. The schooling behavior and courtship displays of this species are truly mesmerizing to observe.

In terms of its feeding habits, Prionobrama filigera has a diverse diet in the wild, and in aquarium settings, it can thrive on a balanced and nutritious diet. Providing a varied diet consisting of high-quality flakes, pellets, frozen or live foods will ensure the health and vitality of captive specimens.

Reproduction and breeding of Prionobrama filigera present an exciting challenge for aquarium enthusiasts. Understanding their reproductive strategies, including spawning behavior and courtship rituals, is essential for successful breeding. However, it is important to note that breeding this species in captivity may come with its own set of challenges and considerations.

The conservation status of Prionobrama filigera is of utmost importance. Assessments by international organizations and databases can provide insight into the current state of this species. Identifying threats and factors contributing to its decline in the wild is crucial for implementing effective conservation efforts. It is encouraging to highlight any ongoing initiatives aimed at protecting this species and its natural habitat.

Prionobrama filigera’s popularity among aquarium enthusiasts is well-deserved. Its compatibility with other fish species and tank mates, as well as its ability to adapt to a variety of aquarium environments, make it a versatile and sought-after addition to any aquarium. Setting up an ideal aquarium environment, with appropriate water conditions and suitable tank mates, will ensure the well-being and happiness of these captivating fish.

In conclusion, Prionobrama filigera, the Glass Bloodfin Tetra, is a remarkable species that captivates the hearts of aquarium enthusiasts. Its unique characteristics, behavior, and visual appeal make it a fascinating addition to any aquarium. Understanding and conserving this species is of utmost importance to ensure its continued existence in the wild. I encourage readers to appreciate the beauty and consider keeping Prionobrama filigera in their own aquariums, not only for the joy it brings but also as a contribution to the conservation of this remarkable species.