Euprymna tasmanica (Sepiolida - Sepiolidae) is a relatively unstudied benthic squid found in shallow waters (0.5 m to at least 75 m deep) along the continental shelf in the temperate waters surrounding southern Australia.
These squids are generally nocturnal and cryptic, and are unique among the cephalopods in that they use a mucus-lined sand coat as camouflage during daylight hours or while being threatened. While Euprymna are of interest for biomedical purposes due to their symbiotic light organ associations and for ethologists due to their behavior, almost nothing is known concerning the biology or behavior of this sepiolid.
Bobtail squid are a group cephalopods of closely related to Cuttlefish. Bobtail squid tend to have a rounder mantle than cuttlefish and have no cuttlebone They have eight suckered arms and two tentacles and are generally quite small. They live in shallow coastal waters of the Pacific Ocean and some parts of the Indian Ocean as well as in shallow waters on the west coast of the Cape Peninsula off South Africa. Like cuttlefish, they can swim by either using the fins on their mantle or by jet propulsion.
Bobtail squid are small, round-mantled cephalopods similar to cuttlefish. There are about 70 species, some of which have been studied for their symbiotic relationships with bioluminescent bacteria. This can provide the squid with a form of camouflage and light by which it can hunt at night.
This photo taken during a night dive at the Pier in Anilao, Batangas (Philippines), shows a bobtail squid striking a defensive pose.
Bobtail squids are cephalopods belonging to the Order Sepiolida, closely related to cuttlefish. They are small (2-8cm), with a short, rounded body, and without a cuttlebone. They have eight suckered arms and two tentacles.
These squids can only be positively identified by examining the arm and suckers of the males. Females are difficult to identify.