Four-eyed fish

Four-eyed fish

   Four-eyed fish, also called anableps, is any of a group of fishes whose eyes can see both above and below the water at the same time. The four-eyed fish has o0nly two eyes, but each is divided into a upper and lower part by a thin band of tissue. As the fish swims near the surface of the water, the upper part of each eye extends above the surface and the lower part remains in the water. Because its vision is relatively keen, the four-eyed fish can see fishermen approaching and is difficult to catch.
   Four-eyed fish inhabit fresh and slightly salt water in Central and South America. They usually travel in schools, feeding on insects and other small organisms. Their young, which are born live, measure from 1½ to 2½ inches at birth and grow to a length of almost 1 foot.