Marine organisms that are euryhaline would most likely be found in which environment?

Answer: Coastal estuary

Explanation:

Euryhaline animals are able to live in the wide range of salinity. These animals have the ability to live in the variety of water mostly fresh water.

The coastal estuary is one of the habitat of such animals. The green crab, molly fish are some example of the animals found in this environment.

Some of the euryhaline animals are also found in the salt and brackish water, fresh water, moderately haline et cetera.