What are the different octopuses you can keep in captivity? What are the differences between each of them, and how easy/hard is each to raise? Thank-you! Right now i'm looking into one like corw314's Biddle. Not sure what species that is though. EDIT: Also, which one is less likely going to bite/attempt to kill you? I want one i can stick my hand up to and just play around with, if that's at all possible.