One in the eye for fish's victims

时间:2019-03-08 07:18:18166网络整理admin

THE eyes of chameleons are no longer unique among vertebrates, say biologists who have found strikingly similar ocular abilities in a fish. Chameleons are renowned for their turret-like eyes which can move independently and judge depth by varying their focus. But Jack Pettigrew of the University of Queensland in Brisbane and his colleagues have found that sandlance fish, Limnichthyes fasciatus, can achieve similar feats. The fish are voracious predators of copepods, and both the lizards and the fish may benefit from being able to target their prey without revealing their intentions by moving their heads (Current Biology, vol 9, p 421). “The fish darting out from the sand looks just like a chameleon’s tongue,