Unit 2 vocab zooloigy

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Across
  1. 3. sea fans, secrete a branching skeleton made of proteins
  2. 4. a sac attached stage (sessile)
  3. 5. internal layer that lines the gut
  4. 8. has a ctentacleslocated mouth surrounded by tenticals
  5. 10. have no bones, no heart, no brain, no real eyes, and respiratory system
Down
  1. 1. calcium carbohydrate skeletons that form coral reefs
  2. 2. includes jellyfish, anemones, corals, and sea pens
  3. 6. one of the most dangerous marine animals
  4. 7. can be found in unpolluted water like ponds,lakes and streams
  5. 9. external layer