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Cnidarians

Cnidarians are invertebrates with a radially symmetrical body and saclike internal cavity.

Man o' war jellyfish. Credit: NOAA Fisheries/Peter Duley Download largest Stalked medusa, Haliclystus californiensis, is just 2 centimeters, or three-quarters of an inch, in length. The specimen was collected off the coast of California. Credit: Allen Collins, NMFS/NOAA Download largest Jellyfish captured at night using a Video Plankton Recorder. Credit: E. Broughton, NEFSC/NOAA Download largest Jellyfish on conveyor belt. Credit: NEFSC/NOAA Download largest Jellyfish on conveyor belt being sorted. Credit: NEFSC/NOAA Download largest Ribbed jellyfish in a plankton sieve just before preservation. Credit: Jerry Prezioso, NEFSC/NOAA Download largest Jellyfish in a basket. Credit: NEFSC/NOAA Download largest