Use reasoning to lead to the answer of the following question:
Crabs live in what sort of environment?\nOptions:\n- maritime\n- bodies of water\n- saltwater\n- galapagos\n- fish market

saltwater
Saltwater refers to the environment of the sea.

Sea have salty water so sea creature get used to live in saltwater environment.

crab is sea creature.

.

Thus, the answer is saltwater