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amoeba a tiny living thing made of only one cell. Amoebas move by changing their shape. They eat by wrapping their bodies around their food. Amoebas live in fresh and salt water, soil, and in animals. Most kinds of amoebas can only be seen through a microscope.
brine salt water. [1/2 definitions]
crustacean an animal with a hard, jointed shell. Crustaceans live in fresh or salt water. There are many kinds of crustaceans, including crabs, crayfish, lobsters, and shrimps. Crustaceans are kinds of arthropods.
eel a long fish that looks like a snake. Eels live in fresh water or salt water.
flatfish a kind of fish that lives in salt water and has a flat body with both eyes on the top side. Sole, halibut, and flounder are flatfish.
iodine a substance that is one of the chemical elements. Iodine combines easily with other elements. It is found in salt water and seaweed. Iodine is poisonous in its pure crystal form. (symbol: I) [1/2 definitions]
lagoon a shallow body of salt water by the sea. A lagoon is separated from the sea by sandbars, coral reefs, or islands. [1/2 definitions]
lake a large body of fresh or salt water that is surrounded on all sides by land.
ocean the vast body of salt water covering about three quarters of the earth's surface. [1/2 definitions]
pickle a cucumber or another vegetable or fruit that has been preserved in salt water, vinegar, and seasonings. [2 definitions]
plankton a mixture of very small plants and animals floating in fresh or salt water. Most kinds of plankton are microscopic. Plankton is an important food source for many animals that live in water.
salmon a fish that lives in salt water but lays its eggs in freshwater streams. Salmon have a color like silver and are used for food. Salmon are related to trout. [1/2 definitions]
saltwater full of salt water; living in salt water.
sea the salt water covering most of the earth; ocean. [2/4 definitions]
seaweed a kind of alga that grows in salt water. [1/2 definitions]
shellfish a small animal that lives in fresh or salt water and has a shell outside its body. Shellfish are not true fish. They are invertebrates, or animals with no backbone. People can eat many kinds of shellfish, including clams, oysters, shrimp, and lobsters.