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i believe i am either going to get one of these two types, i am looking for an octo with great personality and is very interactive. and relatively diurnal. any other suggestions besides these 2? thankss (i have a 40 gallon long aquarium)
Yes, "Caribbean two-spot" is the filosus/hummelincki common name.
The deciding factor between those two would be tank temperature. If you can keep it cold, go for a Bimac. They seem to be much more common in the trade. Saltwaterfish.com is the only place I know of that sells the hummelincki's regularly. However most of the octos that came from swf.com recently, died within days or a couple of weeks after arrival.