The researchers think the original animals preyed on protists or one-celled animals (a shell eat cell world?).
Just when we thought we had these thing figured out. Intro of topic Sharks are infamous meat-eaters. The ocean’s buffet of fish, crabs, mussels, shrimp and krill fill the legendary predators’ stomachs and give them sustenance. Now researchers have discovered that one particular species, bonnethead sharks, also dine on seagrass to meet their nutritional needs. […]