January tetra

Hemigrammus hyanuary

A fine gold-green line meets the bright mark above a dark tail spot

A slender silver body carries a bright lateral line and contrasting tail-base marks.

Provide conspecific company and swimming space; avoid much larger or dominant feeders. Keep at 23–25°C for routine care.

Appearance and identification

Compare the dark tail spot and the bright mark above it, rather than green intensity alone. It is more slender than the head-and-tail-light tetra.

Keep six or more, preferably ten.

Use a 60 × 38 cm footprint for a small group; larger groups need more space.

Use small flakes or granules alongside small frozen and live foods.

Assess size and feeding competition.

A well-maintained planted aquarium with shaded areas suits it.

Sources