One fish, two fish. Green fish, blue fish. Outer teeth, inner teeth. These fish grow a lot of teeth. By Annie Roth If there is one place you don’t want to stick your finger, it’s the mouth of a ...

The Pacific lingcod is an ill-tempered, omnivorous fish with a mouth like a messy silverware drawer, its 500-plus teeth arranged haphazardly on two sets of highly mobile jaws. New research, published ...