1/2/2023 0 Comments Jelly defense guide![]() ![]() The captured food is moved to the edge of the bell where the four central arms collect it. The jelly’s upper bell surface is armed with stinging cells and mucus secretions to help trap prey. The diet of very small prey requires only mild stinging cells this jelly is harmless to most humans.Īt the Waikīkī Aquarium, the moon jellies are fed one to two day-old brine shrimp larvae. The moon jelly’s diet includes micro-plankton, minute crustaceans and fish larvae which it collects as it pulses through the water. The moon jelly, named for its translucent circular bell, is well known worldwide in tropical and temperate waters where it occurs in quiet bays and harbors. However, the life cycle of most jellies includes a small polyp stage. ![]() Medusae are not attached to the bottom, but are carried by ocean currents, floating and swimming weakly by means of muscular contractions of the bell. The jelly-like central layer of a medusa is 95% water, with protein and elastic fibers for gel and flex. Sea jellies, or jellyfish, illustrate the medusa body form: a gelatinous, bell-shaped body with mouth and tentacles hanging down from the undersurface of the bell. In the Cnidarians, there are two basic body forms: the polyp form, like the familiar sea anemone, and the free-floating medusa form. The tentacles bear stinging cells that are used for food capture and defense. Individual animals are radially symmetrical, with a ring of tentacles around the central mouth. They are all simple, soft-bodied organisms with just two major tissue layers arranged around a central gut cavity. Sea jelly relatives include the sea anemones, corals, and Portuguese man-of-war. The moon jelly (also known as a jellyfish) belongs to the invertebrate Phylum Cnidaria, a diverse group of stinging animals whose members all possess stinging cells for feeding and protection. ![]()
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