![]() The freshwater jellyfish is dimorphic, alternating between both a polyp and medusa morph (Johnson and Raven, 1999). This organism lacks a head, a skeleton, contains no special organs for respiration or excretion (Davis, 1998). It is a white or green gelatinous creature, with 99% of its body made of water (Peard, 2000). This organism shares many of the same traits characteristic of most jellyfish. Craspedacusta sowerbyi seems to favor calm water (Pennak 1989, Peard 2000). ( Davis, 1998 Peard, 2000)Ĭraspedacusta sowerbyi has been found in a variety of freshwater environments: freshwater lakes, reservoirs, man-made impoundments, water-filled gravel pits, rock quarries, algae-filled ponds, and rivers. With increased interstate and intercontinental travel, the translocation of Craspedacusta sowerbyi into new habitats continues (Davis 1998). As of February 8, 2000, this organism was reported in 43 out of 50 states. The United States did not report Craspedacusta sowerbyi until 1908. It was first taxonomically recorded in England, in 1880. Craspedacusta sowerbyi is a freshwater jellyfish occupying all continents. ![]()
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