Both species are fine for a 55. I prefer getting octos (and other critters) direct from the collector when possible. There are still chances but often you can directly communicate and the animals are less stressed. For a comparison of the two species in an aquarium, there is my Journal on Octane and Animal Mother's journal on Kalypso (as well as AM's Hummelincki,Tuvalu). Hummelincki is more day active and might be better for a classroom (Octane does not usually wake up until about 2:00 PM and stays up until around 11:00 PM but that my have a lot to do with when we are home).
It is find to post the seller's name when you are searching as usually one of us has ordered from the source and can offer experience info.
It is find to post the seller's name when you are searching as usually one of us has ordered from the source and can offer experience info.