There are at least 40 known species of flying fish. Beyond their useful pectoral fins, all have unevenly forked tails, with the lower lobe longer than the upper lobe. Many species have enlarged ...

with three spines on its anal fin, according to the study. The fish has a “large” mouth and there are “simple, sharp” and “conical” spines near the nasal, researchers said. “The species name ...

Its teeth are designed not so much to grab or slice fish but to prevent them from escaping ... brain has clearly done nothing to hinder the species' long-term survival. Previously known only ...

This species, with its many varieties ... watch out for infection and diseases such as fin rot, dropsy, and swim bladder disease. While Betta fish can tolerate dirty water for a short period ...

Usually growing from 3.5 to 4.3 inches as adults, these medium-sized fish are translucent silver on their sides and olive to iridescent pink on their back. Their most distinctive characteristic is ...

DESCRIPTION: The desert pupfish is a small, silver-colored fish with dark vertical bars on its sides. It has a short, compressed head, an upturned mouth, a thick, chubby body, and rounded fins ...