Observations on the behavior and larval development of Acanthomysis sculpta (Tattersall), (Mysidacea)

Observations on the behavior and larval development of A. sculpta collected from a surge channel at Botanical Beach, Vancouver Island, British Columbia, were made from 12 to 25 August, 1965. Larvae-bearing females were kept in compartmented plastic trays and larvae from their brood pouches were periodically removed and preserved. Development from hatching to liberation from the brood pouch takes about 5 days at about 12 °C. Apparently, the young are liberated from the brood pouch only at night. The nocturnal emergence of the young is considered to be important to their survival in that it helps prevent them from being eaten by larger specimens.