invertebrate invertebratean animal that lacks a backbone (marine examples include lobsters, shrimp, squid, clams, crabs, and sea stars). Related Articles: Glossary: exoskeletonBiological OceanographerHot Topic - Monitoring Wind Farm ConstructionHot Topic- Seismic AirgunsHow do marine animals use sound?What are common underwater sounds?Why is sound important to marine animals?Behavioral Changes in FishesAudio GalleryMantis Shrimp Chris Knowlton2018-01-19T18:09:14-05:00