Bigeye Chub

Hybopsis amblops is a dainty and relatively rarely kept small chub with disproportionately large eyes — an adaptation for hunting small invertebrates in the dim conditions found near stream substrate. It inhabits clear, gravel-bottomed streams and rivers of the eastern and central United States, where it forages near the bottom in loose aggregations. Its modest colouration — silver with a faint lateral stripe and dark lateral spot — belies its charm when observed closely.

In the aquarium, Bigeye Chubs do best in cool, clean water with gravel substrate and gentle to moderate current. They are shy initially and appreciate cover in the form of scattered rocks and overhanging plants. Groups of six or more reduce stress and encourage more confident foraging behaviour.

They are one of the smaller chubs suitable for mid-sized native aquaria and can be combined with darters and other small stream species in a carefully designed biotope. They accept small live and frozen invertebrates readily but are somewhat reluctant to take prepared foods.

Water: 12–24 °C, pH 6.5–8.0, moderate hardness; clean water, gentle to moderate current. Tank: 60 L minimum; gravel substrate, scattered stones, some plant cover; subdued lighting. Feeding: Live/frozen Daphnia, small bloodworms, micro-invertebrates; patient pellet transition. Breeding: Little documented in captivity; provide fine gravel and clean water to encourage spawning. Compatibility: Peaceful; good companion for small darters and other small native stream species.