With a head like a fighter-plane cockpit, a Pacific barreleye fish shows off its highly sensitive, barrel-like eyes--topped by green, orblike lenses--in a picture released today but taken in 2004.

The reef fish are named for their bulbous foreheads, which add to their eccentric, pouty lips and yellowish-to-pink faces. [See Photos of Head-Butting Fish ] "To us, it sounded like someone was ...

The reef fish are named for their bulbous foreheads, which add to their eccentric, pouty lips and yellowish-to-pink faces. [See Photos of Head-Butting Fish] "To us, it sounded like someone was ...

Some fish can recognize their own faces in photos and mirrors, an ability usually attributed to humans and other animals considered particularly brainy, such as chimpanzees, scientists report.

How's this for a head turner? A tiny new species of fish from Vietnam sports its genitalia on its noggin. Phallostethus cuulong is only the 22nd known species of its family, Phallostethidae ...