👉 The term "zonitidae" is a genus of crustaceans in the family Zonitidae. These are marine animals that belong to the order Chondrichthyes, which includes the bony fish and squid. They have a long, flattened body with six pairs of legs (an eudiplomous system) and are known for their echolocation abilities, which they use to navigate through water. Zonitidae is also known for their ability to change