Caribbean Two Spot?

[Mathis]

I caught this one while I was working. Had a decently painful bite, but was more surprised because never had an octopus bite me with that much pain before. This was by far the most curious octopus I have ever witnessed and it changed colors extremely often and quickly. Was found on shallow reef in Aruba in about 7-8 feet of water.

Was returned home afterwards exactly where I found him/her.

 

[DWhatley]

Yes, I would agree that this is O. hummelincki (Caribbean two spot, also known as O. joubini). I saw one while snorkeling in St. Maarten (my first in the wild!) several years ago. Typically the species is quite docile but I did have one that was very aggressive and would approach me with colors flaring. She started brooding very shortly after entering the tank so, anecdotally, the aggression might suggest that this one, too, was about to brood.

Do you have a photo that would include the third right (clockwise as you orient your eyes with the octos) arm? That might help determine its sex.