Swim along the edge of a coral reef and you'll often see schools of sleek, torpedo-shaped fishes gliding through the currents ...

A crescent-shaped tail, like that of the swordfish, allows the fish to swim rapidly through the water. A forked tail, like that of the trout, can also allow fast swimming. A rounded tail ...

Beyond their useful pectoral fins, all have unevenly forked tails ... the four-winged flying fish breaks the surface and begins to taxi by rapidly beating its tail while it is still beneath ...

Ever since Charles Darwin, scientists have assumed species facing the same problem often evolve similar traits. But that’s ...

Swim along the edge of a coral reef and you’ll often see schools of sleek, torpedo-shaped fishes gliding through the currents, feeding on tiny plankton from the water column. For decades, scientists ...