Although great white sharks are very big, their behaviors are still agile, and they have strong explosive ability when preying, and can launch attacks on prey in an instant. They usually prey during the day and rest properly at other times. They also swim all the time when they are resting. Because they belong to cartilaginous fish, they have no swim bladder in their bodies, so they can't use it to assist breathing. Only by constantly swimming and letting the water flow through its gills can it keep breathing. If they don't swim for a long time, they will suffocate.