On the Air: May 1, 2016
Sea foam at Ocean Beach in San Francisco. Credit: National Oceanic and Atmospheric Administration

The foam on a latte, or the foamy meringue on top of a lemon pie, can be a delightful treat. The foam on the ocean? Not so much. It contains some ingredients that you don’t want to eat.

Sea foam is created by strong winds. As the wind blows across the water, it creates waves. When the waves ripple and break, they create bubbles of air. But it’s the material that forms the “skin” of the bubbles that can be so unappetizing.

In Print: May 1, 2016
Zooplankton, crustacean larva seen under a microscope. Credit: National Oceanic and Atmospheric Administration, photographer: Matt Wilson/Jay Clark.

Tiny marine creatures known as zooplankton feed on phytoplankton, which use photosynthesis to create their food. Since phytoplankton tend to hang out at the ocean’s surface to absorb the sun’s energy, zooplankton head there for their meals each night. But when morning arrives, zooplankton become targets for predators, so they move to deeper waters during the day.