[Ebook] The New Guide to Aquarium Fish – Characins – Hatchetfishes
When you think about surfacedwelling fishes for the community aquarium, usually the first ones that spring to mind are the hatchetfishes of the family Gasteropelecidae. The two genera usually encountered by the aquarist are Gasteropekcus and Carnegiella. These are easily differentiated as Gasteropekcus is larger (up to 9 cm (3 1/2 in) in the case of Gasteropekcus maculatus) and has an adipose fin, whereas Carnegiella is smaller (4 cm ( 1 1/2 in) in the case of Carnegiella strigata) and lacks an adipose fin.