HI, i'm new to the forums, but i'm already started to get addicted to octopus and cuttlefish :(. A while back I looked at getting some dwarf cuttlefish (Sepia Bandensis), but of course, the only source for them was quickly bought out before I even had time to click "bid". Now, after my recent seahorse incident (my Hippocampus Reidi died from Vibrio x Gas Bubble Disease), i'm thinking about dedicating the tank to an octopus. While seahorses are still my "main thing", i'm relinquishing my 30 gallon to something else as I do not want the risk of vibrio being spread around again. So, I guess my question starts here..are there any species of octopus that can be housed in a 30 gallon for LIFE? I keep reading different info everywhere I go. I see Vulgaris and Bimaculoides are the two "commonly" kept octopus, and are for "beginners". But, I never really see what maximum tank size is for either. One place says my 30 gallon would be okay, and another article says nothing but a 50 gallon MIN for any octopus other than blue-ringed, etc. (obviously I wouldn't risk it, but really,I have no desire whatsoever to own one). I heard Bimaculoides gets "biggish", so i'm guessing that rules that one out. Can anyone help me here? Any octopus OR cuttlefish possibly that can be kept in a 30 gallon? I'm not going to die or anything if I can't own one, but I have a 30 gallon that's empty, i'm LOVING octopus and cuttlefish, and I really don't like common saltwater fish like clownfish, etc. I was angry that I wasn't able to posess Sepia Bandensis, and I really hope my "dream" of owning a octopus, etc. aren't put off again. I'm not worried about care or the like..just worried about the size of my tank. If you need any info on my set up, just ask and I can give it out! Thanks in advance!