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corals
Yes crayfish have 3 joints
3
annelids
Are annelids vertebrate
3, go to this web page for a fantastic explanation: www.science.mcmaster.ca/.../CRAYFISH/CRAYFISH.HTM
3 of the water invertebrate groups are the annelids, arthropods and crustacean.
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Annelids have an anus
3, go to this web page for a fantastic explanation: www.science.mcmaster.ca/.../CRAYFISH/CRAYFISH.HTM
Grasshoppers have spiracles that help them breath whereas crayfish breath through gills.
Yes, Annelids are invertebrate animals .