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Scyphozoans

Scyphozoans. Victor Perez Ms. Leza Marine Biology/Block 4 7 March 2013. I. The Basics. Class: Scyphozoa Commonly known as true jellyfish Not strong swimmers (swim by pulsating their bell). F loat along with currents and are part of plankton.

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Scyphozoans

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  1. Scyphozoans Victor Perez Ms. Leza Marine Biology/Block 4 7 March 2013

  2. I. The Basics • Class: Scyphozoa • Commonly known as true jellyfish • Not strong swimmers (swim by pulsating their bell). • Float along with currents and are part of plankton. • Medusa is the predominant stage in the life cycle.

  3. II. The Structure • The medusae of the Cyanea, have a bell diameter of 7-10 ft. wide and 200-230 ft. long tentacles.

  4. III. Life for the Jellyfish • Carnivores (feed mainly on fish and large invertebrates). • Upside Down Jellies trap plankton by mucus. • Lacks a true mouth • Food passes thru fused tentacles by cilia to openings of the gastrivascular cavity (where it’s digested).

  5. IV. Life Continued • Upside down jellies chill in lagoons because sunlight and they reach symbiotic algal cells to provide them Oxygen and Nutrition. • Box jellies are tropical animals and are box shaped. • Feed mainly on fish • Stings can be fatal to humans. • Sometimes Jellies get to close to shore in Australia where sea Wasps are and they close the beaches.

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