an anthropod is an animal with an exo sketeton.
95% of Animals are Invertebrates.
Fish is an animal with gills and lives under water
Mollusc: an invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses. They have a soft unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.
Arthropod: an invertebrate animal of the large phylum Arthropoda, such as an insect, spider, or crustacean.
s a phylum containing over 10,000 species of animals found exclusively in aquatic and mostly marine environments. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey.