| A | B |
|---|
| larva | immature form of an animal that looks very different from an adult |
| cnidarians | an invertebrate animal that uses stinging cells to capture food and defend itself |
| polyp | the cnidarian body plan characterized by a vaselike shape and adapted for a life attached to an underwater surface |
| medusa | the cnidarian body plan having a bowl shape and adapted for a free swimming life |
| colony | a group of individual organisms living or growing together |
| coral reef | a diverse environment named for the coral animals that make up its stony structure |
| mollusks | an invertebrate with a soft, unsegmented body; most are protected by a hard outer shell |
| gill | an organ that removes oxygen from water |
| gastropod | a mollusk with a single shell or no shell |
| gastropod example | snails or slugs |
| radula | a flexible ribbon of tiny teeth in mollusks |
| bivalve | a mollusk that has two shells held together by hinges and strong muscles |
| bivalve example | oysters and clams |
| cephalopod | ocean-dwelling mollusk whose foot is adapted as tentaclesthat surroun its mouth |
| cephalopod example | octopus and squid |
