Vocabulary
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.
Crustaceans
Gelatinous
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Definition: thick and slow to flow
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Synonyms: jelly-like, gooey

Sentence: The gelatinous movement of
the jellyfish was mesmerizing.
Gelatinous Movement
Menagerie
Definition: collection of animals
 Synonyms: bunch, assembly


Sentence: The scientists were amazed
by the menagerie of strange creatures
living in the deep sea.
Menagerie of Creatures
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
Oceanographers study water samples.
Jacques Cousteau is a famous oceanographer.
Submersible
Definition: craft that goes under water
 Synonyms: underwater craft, sub


Sentence: Research submersibles are
able to go much deeper than divers.
Research Submersible “Alvin”
Alvin gets lowered
into the sea.
Alvin under water.
The crew
inside Alvin.
Tentacles
Definition: long, stretchy limbs
 What animals have tentacles?






Octopus
Squid
Anemone
Jellyfish
Sentence: The octopus wrapped its
tentacles around its prey.
Tentacles
Anemone
Octopus
Undulates
Definition: moves in smooth, wavelike
fashion
 Synonyms: flows, alternates


Sentence: A manta ray’s wings undulate
as it moved through the water.
Undulating Wings
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.

Hypothermic Vent:
A crack in the ocean floor