[2] The Atlantic brief squid occurs most frequently in shallow waters along the eastern seaboard of the United States as far north as Delaware.

It has also been found in Argentina, Brazil, the British Virgin Islands, Colombia, Mexico, Panama, Puerto Rico, Suriname, Trinidad and Tobago and Venezuela.

The left 5th appendage of males is modified to form a hectocotylus arm which is used to transfer spermatophores into the female reproductive organ.

The posterior end of the female mantle is occupied by a pair of white nidamental glands which secrete the material from which the egg capsule is formed.

To catch fast moving prey, the contraction is vigorous, sending a jet of water through the funnel which is directed backwards.