Bloodfin Tetra

Bloodfin Tetra (Aphyocharax anisitsi)

Appearance & Behavior

Bring flashes of silver and red to your freshwater aquarium with Bloodfin Tetras. Their slender, reflective bodies contrast with vivid red fins, creating a lively display as a group moves through open water. These hardy, social fish are active swimmers and become more confident among their own kind. They are generally peaceful, though occasional chasing and fin-nipping can occur, especially in small groups or cramped surroundings.

Quick Care Guide

• Care Level: Easy; best in an established aquarium

• Temperament: Generally peaceful and active; may occasionally nip fins

• Adult Size: Approximately 2 inches

• Minimum Aquarium Size: 20 gallons long; larger aquariums recommended for bigger schools and community stocking

• Temperature: 65–78°F

• pH: 6.0–8.0

• Water Hardness: Soft to moderately hard water, approximately 5–20 dGH

• Diet: Omnivore

• Swimming Area: Middle to upper

• Recommended Quantity: At least 6; preferably 8–10 or more when aquarium space and stocking allow

Aquarium Setup & Compatibility

Provide planted edges, shaded retreats, and generous open swimming space. Bloodfin Tetras do best in a fully cycled aquarium with stable water conditions, good oxygenation, and gentle to moderate circulation. They tolerate cooler conditions than many tropical tetras, but temperature should remain stable and suit every tankmate. Use a secure lid with covered gaps, as these quick swimmers can jump, and avoid abrupt changes in temperature or water chemistry.

Good companions include similarly sized peaceful tetras, suitable rasboras, and Corydoras species with compatible temperature requirements. Avoid aggressive fish, larger predators, and very timid fish that may be outcompeted for food. Slow-moving or long-finned fish are less suitable because Bloodfin Tetras may nip their fins. Adult dwarf shrimp may coexist, but shrimplets can be eaten. Monitor interactions and address persistent chasing or fin damage.

Feeding

Feed Hatchery Diet 1.2 mm, supplemented with Daphnia and Bloodworms. Crush pellets or cut larger bloodworms into smaller pieces as needed to fit their mouths. Offer small portions across more than one feeding spot so less dominant fish have a chance to eat.