A food chain shows how plants and animals depend on each other as their ... and bigger fish are eaten by sea lions who are then eaten by sharks! There are lots of different food chains taking ...

Sharks are apex predators in our oceans. They instill fear in people of all ages, and a lot of that is thanks to the movie ...

If zooplankton fail to reproduce, it disrupts the food chain, threatening fish populations and, in turn, seals and other large animals. "If we still have some sea ice, but it's melting more ...

Scientists discovered ancient marine reptiles that reached unprecedented trophic levels. These creatures exceeded today’s top predators.

The result? A frightening phenomenon that's making seawater more acidic, spelling disaster for many marine animals, from plankton and coral up the food chain to sea stars, salmon, sea otters, whales — ...