Most carnivores have teeth to grasp and eat prey, so marine animals with teeth are not uncommon. Sharks, dolphins, eels, whales, many fish species, and marine mammals like seals and sea lions have ...

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It's not what you do, it's how readily you do it. Rapid evolutionary change might have more to do with how easily a key innovation can be gained or lost rather than with the innovation itself, ...

To say spotted ratfish are unusual is an understatement. Related to sharks, they abound in the inky dark depths of the Puget Sound. Armed with a venomous fin, they swim gracefully along the sea floor ...

A juvenile spotted ratfish. These deep-sea fish are named for their long, rat-like tails. Gareth J. Fraser, University of Florida Deep in the ocean, you can find a strange fish with teeth not just in ...

Not all creepy things go bump in the night -- some of them swim. While you might think of fish as harmless little dudes hanging out in your aquarium, there are some ...

From baby teeth to ‘conveyor belt’ molars, here’s why humans—and other mammals –grow and replace their teeth in such ...

The cichlid fish of Africa's Great Lakes have formed new species more rapidly than any other group of vertebrates. A new study shows that the ease with which these fish can develop a biological ...