[2] Americamysis bahia is native to the east coast of the United States, its range extending from Rhode Island to Florida and the Gulf of Mexico.

It is seldom found at depths greater than 2 m (6 ft 7 in) and its typical habitat is over sandy or muddy seabeds, often in seagrass meadows.

[3] Americamysis bahia is found on or just above the seabed, tending to be concentrated in slight depressions and facing towards the current.

Opossum shrimps play an important part in the food chain and are consumed in large quantities by such fish as the inland silverside, whiffs and flounders.

[4] Female Americamysis bahia shrimps become mature between the twelfth and twentieth day, depending on diet and temperature.