1. Vocabulary

2. Crustacean  Definition: hard-shelled animals that usually live in the water  Examples: shrimp, lobster, crab, prawns  Sentence: Crustaceans are an important food source for many cultures.

3. Crustaceans

4. Gelatinous  Definition: thick and slow to flow  Synonyms: jelly-like, gooey  Sentence: The gelatinous movement of the jellyfish was mesmerizing.

5. Gelatinous Movement

6. Menagerie  Definition: collection of animals  Synonyms: bunch, assembly  Sentence: The scientists were amazed by the menagerie of strange creatures living in the deep sea.

7. Menagerie of Creatures

8. Oceanographers  Definition: scientists who study the sea  What do oceanographers study? Marine plants and animals Ocean floor geography Plate tectonics Waves, tides, and currents Marine resources

9. Oceanographers study water samples.

10. Jacques Cousteau is a famous oceanographer.

11. Submersible  Definition: craft that goes under water  Synonyms: underwater craft, sub  Sentence: Research submersibles are able to go much deeper than divers.

12. Research Submersible “Alvin” Alvin gets lowered into the sea. Alvin under water. The crew inside Alvin.

13. Tentacles  Definition: long, stretchy limbs  What animals have tentacles? Octopus Squid Anemone Jellyfish  Sentence: The octopus wrapped its tentacles around its prey.

14. Tentacles Octopus Anemone

15. Undulates  Definition: moves in smooth, wavelike fashion  Synonyms: flows, alternates  Sentence: A manta ray’s wings undulate as it moved through the water.

16. Undulating Wings

17. Unfathomable  Definition: impossible to measure  Synonyms: bottomless, infinite  Antonyms: shallow, understandable, limited  Sentence One: The depth of the ocean trench was unfathomable.  Sentence Two: For boys, the mystery of girls is sometimes unfathomable.

18. Hypothermic Vent: A crack in the ocean floor