Sorry I haven't posted much in the last 2 weeks, I was in Perth and had a great time. I also paid a visit to the Aquarium of Western Austrailia (AQWA) they had a blue-ring and a cuttle. The cuttle had a 20cm mantle and the blue ring had a 10cm mantle. The blue ring was housed in a 50cm by 30cm by 30cm (estimate) with shrimps and anemones Its arms also seemed really short. The cuttle was kept in a pretty large reef tank with larger fish (groupers...etc), I'm willing to bet it could take on most, if not all of them if he were hungry. Both were sitting there doing basically nothing :? They had quite alot of other displays like seahorses, dragons, baby crocs, stonefish and the usual stuff.