Scyphozoans evolved from a species of large amphibious sea jellies, which hunted on land and in water along the coastlines of Primoria’s temperate zones (see page 48). A scyphozoan has a soft and translucent body, with several ambulatory tentacles as well as two prehensile tentacles. In water, a scyphozoan swims by expanding and contracting its bell, which propels the creature forward. The bell and tentacles are sensitive to vibrations in the air or water, allowing the scyphozoan to sense nearby creatures even if she can’t see them. A scyphozoan is approximately 7 feet tall and weighs up to 200 pounds. Other species find it difficult to tell male and female scyphozoans apart because the two sexes exhibit few differing characteristics.

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