Scientists track Antarctic krill via satellite to monitor ocean health amid climate change and fishing threats.

This is only the second time the species has been recorded while alive. “I thought it was A.I.,” says fish biologist Kory Evans.

Then, they become a food source for zooplankton – tiny animals that live deep in the ocean, but swim up during the night time to feed. An adult zooplankton. This tiny animal just had a meal.

but they also appear to help to protect smaller sea creatures. During an expedition in the Gulf of California, researchers from the Monterey Bay Aquarium Research Institute spotted small fish ...