Here in the sea, seaweed and plankton do the job. A plant that converts the Sun's rays into energy is called a producer. They are the start of a food chain. Animals get all the energy and ...

The diagram shows how mercury can accumulate in the food chain. In the sea, tiny animals and plants called plankton absorb the mercury compounds. When the plankton are eaten by small fish ...

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 JAWS and the media blowing shark attacks way out of proportion. These strange ...

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.

If they die, there’ll be fewer big fish—and that could rattle the food chain. marine-plastic-ocean-fish-microplasticThe ... around the world, and the animals that eat them, depend on just ...

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 — ...