The huge problem with many squid is that they are immensely difficult to keep alive in captivity and require systems that are well beyond the means of most home aquarists. Loliginid squids, like the market squids and the Sepioteuthis Steve and Kat are raising have been held (At Galveston and of course Auckland!) but the more open ocean species haven't. We tried to keep Nototodarus sloanii alive but with little success (the longest lived for a week) They need specialised tanks (& even as a marine research lab we didn't have them) and mega amounts of food (live and kicking!!!) basically they need to been swimming in a soup of food!....right Steve??
Cheers
J