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Do all marine invertebrates have shells?

No, not all marine invertebrates have shells.  Many do, but others have no inner or outer shell, such as jellyfish and nudibranchs (sea slugs).  Squids have mesodermal shells and octopuses have no shells.

Category:
  • Marine Life
  • Marine Invertebrates
Keywords: scuba diving faqs, marine life, marine invertebrates, jellyfish, nudibranchs, squids, octopuses, sea slugs Author:
JGD
Related Tags: Scuba Diving FAQs