Sea urchins climb onto kelp when their densities are so high they remove all drift kelp and then actively forage on attached, living kelp. (Credit: Steve Lonhart / NOAA MBNMS) Tipping points are the ...
Fish, a gar and a catfish, both native to the Mississippi River swim in an aquarium at the Mississippi River Museum in Tunica, Mississippi on Feb, 7, 2025. Credit: Karen Pulfer Focht / Tennessee ...