👉 Term for a group of animals that include fish, crustaceans, and certain types of bivalve molluscs, characterized by their hard, non-vascular skin on the surface and their ability to swim efficiently through water.
👉 Term for a group of animals that include fish, crustaceans, and certain types of bivalve molluscs, characterized by their hard, non-vascular skin on the surface and their ability to swim efficiently through water.
