They can live in brackish and even in sea water.
Shell with prominent spire; distant from right tentacle, generally appendiculated; brackish water or fluviatile.
Its surroundings are bleak and sterile and its waters brackish and polluted with the drainage of the neighbouring city for nearly four centuries.
In the brackish waters of the east coast sea fish are found, together with pike, perch and other fresh-water forms. The crayfish is common in many places in central and southern Sweden.
Lancelets are found in brackish or salt water, generally near the coast, and have been referred to several genera and many species.
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