Marine Invertebrates (Benthos and Nekton organisms) 0.0 / 5 ? Marine ScienceMarine ecologyUniversityNone Created by: scaryCreated on: 12-01-18 13:02 34762810195 Across 1. what is the largest and most varied group of molluscs? (10) 5. What muscles are used by living clams to close the shell (8) 6. What are used to help filter water in and out of a clam whilst octopuses use it for jet propulsion? (6) 7. What class lacks the medusa stage and only exists in polyp form? (8) 9. Which phylum do anemones, jelly fish and corals belong to? (8) Down 2. What is the largest class of crustaceans? (8) 3. What phylum do sea stars, urchins and cucumbers belong to? (13) 4. What phylum do insects crabs spiders and barnacles belong to? (9) 8. What is the name of the head and thorax which is fused together? (13) 10. What type of radial symmetry do sea stars possess? (11)
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