Hello, I am wanting to get into octopi. I have saltwater aquariums but have not ventured into the realm of octopi. My local Fish store has a dwarf octopus and they get them in on a regular basis. The owner said they will only get 12 inches long and I could house them in a 15-20 gallon tall tank. I would like to get some info on this type of octopus and see if that is true. Also I heard that a dwarf octopus only lives 6 months. While I know that octopi don't live long (1 1/2 years), 6 months seems very short. Any info will be appreciated.