(Or as the kids might call it: ‘see-through head fish.’) The funky fish with the transparent head was first described in 1939, but only now do researchers understand the complexities of their ...

A bizarre deep-water fish called the barreleye has a transparent head and tubular eyes. Since the fish's discovery in 1939, biologists have known the eyes were very good at collecting light.

While its body is mostly dark, the top part of its head is transparent, and its eyes are clearly visible. According to evolutionary biologists, it developed such a powerful sense of sight as a ...