| A | B |
| biologist | scientist who studies living things |
| bluff | a high steep slope or cliff |
| lagoon | a pond or small lake, connected with a larger body of water |
| massive | big and heavy; bulky |
| rumbling | making a deep, heavy, continuous sound |
| tropical | north or south of the equator where the sun can shine directly overhead |
| encounter | an unexpected meeting |
| exhaling | breathing out |
| migrate | moving from one place to another |
| sand | tiny grains of stone or shell |