These are animals without backbones In freshwater aquaria only snails and crayfish/shrimp are generally available For marine aquaria, many kinds of animals are available
One of two great divisions of the animal kingdom, including all animals having no backbone or spinal column It includes all animals except fishes, amphibians, reptiles, birds and mammals
Animals that lack a spinal column or backbone, including molluscs (e g , clams and oysters), crustaceans (e g , crabs and shrimp), insects, starfish, jellyfish, sponges, and many types of worms that live in the benthos
This is a collective term for all those animals which do not belong to the phylum Chordata (i e those without a backbone, or vertebral column) This is a general term and is not a scientific classification
No state agency has legislative authority for the caretaking of terrestrial invertebrates No agreement exists between any state agency and the Federal Fish and Wildlife Service for the protection of Federally listed terrestrial invertebrates The Fish and Boat Commission has limited legal authority for the caretaking of aquatic invertebrates