9781422276785

WORDS TO UNDERSTAND:

: A mixture of fresh water and salt water, typically found

in estuaries and bays.

Firm, whitish, rubbery connective tissue that makes up much of the bodies of sharks and rays. This tissue takes the place of bones. The top side of an organism. A group of rays of the same species that travel, eat, and live together. The underside of an organism.

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