Pls read and answer the question

At first glance, the Arctic Ocean might not look like a great place to live. After all, it’s cold there! However, despite its year-round cold climate, the Arctic is full of life. The chilly Arctic waters are home to many different populations of organisms, from tiny algae to giant whales. To learn more about the populations that can make up an Arctic ecosystem like the Gulf of Alaska, read one or more of the chapters that follow.Moon jellies got their name because of their pale, round bodies, which look like the full moon. Unlike many types of jellies, moon jellies do not have long tentacles for catching food. Instead, they trap zooplankton (ZOH-plank-tun)—tiny animals floating in the water—on the sticky undersides of their bell-shaped bodies. These jellies do sting the zooplankton they catch, but they need only a mild sting because the zooplankton are so small. The sting of a moon jelly is harmless to humans.


Moon jellies can move themselves through the water by squeezing their bodies in and out, but they are not strong swimmers. Most of the time, they let water currents move them from place to place. These jellies are seldom seen alone: they usually appear in huge groups of hundreds or even millions of jellies. Gathering in groups may provide some protection from predators such as sea turtles.

Which population(s) did you read about?