I am looking for information on the octopus species O. hummelinki and the O. aculeatus. I would like to know if they are right for my tank. I would also like to know what type of personality they have. I have a 75 gallon tank w/ canister filter sump w/ live-rubble, a protien skimmer and a water temp of about 80*. If anyone has any other suggestions for a octo species pleas let me know.