What is the name for a sea creature with a shell called?

What comes between child adult in the human life cycle? Is it safe to keep a pregnant red-eared slider as a pet? What do geospiza parvula eat? What is a Narrow box for animals to eat from? IF injested will glitter harm a small animal? What animal has an external skeleton? What is the song If the fish swam out of the ocean grew legs and started walking and the apes climbed down from the trees grew tall and started talking why did you put my life into motion? How big is a Coperbyte? What are animals that make buzzing sounds? What are the characteristics of a goldfish with spots? How do modifications or adaptations help an organism? What offers the cheapest price to a flight to Miami? Why is my cat licking fur off its tummy? What are the potential risks and considerations associated with breeding kittens for sex? Is it safe for dogs if Dawn dish soap is swallowed? What kind of animal makes caviar? What is the average weight of an ovcharka? Name something babies and puppies have in common? Is it possible to crate train one dog and not the other? Do dogs' coats change color over time?