Among the ocean's most dangerous creatures, size isn't everything; in fact, some of the smallest marine animals are among the most dangerous. For exam.

This unassuming octopus pairs bacterial chemistry with evolutionary efficiency to deliver one of the most powerful defenses in all of the ocean.

From baboon to box jellyfish, here are 25 animals beginning with the letter B ...

Octopuses have gotten a reputation for being cunning camouflagers and intelligent creatures. But some are known for a more ominous reason: They're deadly. One group — the blue-ringed octopus (genus ...