Learn what this seven-armed cephalopod loves to eat and how it catches its prey. Lurking in the ocean’s twilight zone — an area between 650 and 3,000 feet below the surface where light rarely reaches ...

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 ...

Most complex organisms have a permanent hole for excreting waste. (Though there are exceptions, like the warty comb jelly, which forms an anus only when nature calls.) In bipeds and quadrupeds, the ...