3-room apartment

Erythrosonus - Hemigrammus erythrozonus Erythrosonus Hemigrammus erythrozonus Durbin, 1909). The common Russian name is Tetra firefly. Old Russian aquarists also call the fish "Gracilis" (after the outdated Latin name Hyphessobrycon gracilis). It belongs to the Cypriniformes order, the Characoid suborder, the Characidae family, or the American tetras. The size is about 4 cm.