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Serpae Tetra

Hyphessobrycon eques

Also known as: Serpae Tetra, Jewel Tetra, Callistus Tetra, Blood Tetra

Origin: South America (upper Amazon, Paraguay basin)

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Water Parameters

Temperature2228 °C
15 °C35 °C
pH5.57.5
49
GH (Hardness)115 °dGH
0 °dGH30 °dGH
KH (Alkalinity)08 °dKH
0 °dKH20 °dKH

Quick Stats

Max Size
4 cm
Min Tank
60 L
Lifespan
3-7
Swimming Level
middle
Schooling
Yes (8–15+)
Diet
omnivore
Temperament
semi-aggressive; fin-nipper when in small groups

About

Hyphessobrycon eques, the Serpae Tetra, is native to the upper Amazon and Paraguay basins. Its fiery red body, black humeral spot, and striking dorsal fin markings make it one of the most visually striking commonly available tetras. It has a reputation for fin-nipping, which is greatly reduced when kept in large schools of 10 or more with similarly active tank mates in a spacious aquarium.

Care Guide

Water: 22–28°C, pH 5.5–7.5, soft to moderately hard. Tank: 60 L minimum; some planting and open swimming space; avoid slow-finned tank mates. Feeding: Omnivorous; accepts flake, pellets, frozen bloodworm, brine shrimp and daphnia. Behaviour: Semi-aggressive and fin-nipping tendency; keep in schools of 10+ to reduce aggression. Compatibility: Best with active robust fish like barbs, danios, and larger tetras.

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