Echeneis naucrates Color varies, but this fish has a broad dark stripe at midside, offset above and below by pale bands, the pale bands becoming very narrow on the adults (ours unfortunately lost a lot of color before we got the chance to take the picture). A member of the remouras, family Echeneididae, all of which are distinguished by the sucking disk on the top of the head. They attach themselves to sharks, turtles and larger fish. They then feed on parasites, small fish, and scraps of fish left behind by their hosts. They have no food value. They can grow as large as 3 ft. The one above measured about 18".