What is the difference between krill and zooplankton?
“Most animals that are considered zooplankton have some ability to swim (copepods, jellies, etc.), but they are not strong enough swimmers to be in control of where they are in the water column. There is some debate about whether krill should truly be considered zooplankton, since the term suggests that they are being passively pushed around by the water when we know that they are able to swim down 100+ meters deep every day and back to the surface every night. Krill have five sets of swimming legs, called pleopods, and are pretty strong swimmers.” Are the Poles important ecosystems for krill? Krill are found in the polar and temperate oceans, but not in tropical waters. They are very important to marine ecosystems, lots of animals eat krill. Pretty much everything in Antarctica eats krill. “Antarctica doesn’t have large schools of pelagic fish like those found in the Arctic. In the Arctic, the schooling fish (like herring or pollock) eat the krill and the larger predators like seals,
