Its teeth are designed not so much to grab or slice fish but ... paired fins much like land animals move their limbs: the right pectoral fin moves in conjunction with the left pelvic fin, for ...

Many species have enlarged pelvic fins as well and are known as four-winged flying fish. The process of taking flight, or gliding, begins by gaining great velocity underwater, about 37 miles per hour.

The female’s genital opening and the male’s sex organ—a pipelike modified fin called a gonopodium—are turned to the right on some fish and to the left on others. This means that a righty ...

The “wings” are the area on the ventral side of the fish, from the pelvic fins forward to the throat latch. The wings include ...