clam, octopus, squid. Educational Note: Mollusks have a radula (a tongue-like feeding structure) and a mantle that secretes their shells. Echinoderms Definition: Radially symmetrical marine animals. Examples
bians, birds, and even some mammals depend on them for sustenance. By learning to identify common freshwater invertebrates of North America, you gain insight into the intricate connections that sustain aquatic life. Common Groups of Freshwater Invertebrate
alves: These freshwater mussels include species like Lampsilis and Elliptio. They are important bioindicators and often have complex life cycles involving fish hosts. Ecological Role Grazers controlling algal growth.
