Just thought I'd share, Someone brought a very small octo into my LFS that I work at, wondering if it was ok to keep in his reef. He found it while out diving. When he discovered that it couldn't be kept in his reef, without causing danger to all his invertebrates, he wanted to leave it at the store. We didn't want it there, as we had no where to keep such a tiny critter, so I took it home with me. I believe it is a dwarf species, but I'll let you guys check him out. I plan to keep him in a 20 gallon for now. But I have plenty of tanks available if I need to move him into a bigger one. I have experience keeping cuttles, but this will be my first time with an octo. Hopefully all goes well.