[Ebook] The New Guide to Aquarium Fish – Characins – Anostomids
You could be forgiven for thinking that these fishes are surface dwellers, because they have long, streamlined bodies and small upturned mouths. But nothing could be further from the truth. The anostomids, sometimes referred to as “headstanders”, inhabit very fast-flowing waters in rocky stretches of rivers. They are found, head down, in narrow, vertical, rocky fissures. In the aquarium provide vertical crevices, which can be constructed from either actual rocks or plastic substitutes to lessen the weight.