hummelincki would certainly make more sense if he's from the Atlantic... I guess now that I look at the spots again, they do have more of a yellow-around-blue look to them, rather than the ring-of-blue-chain like bimacs... but the texture and coloration looks rather bimac-ish to me...
Octane is from either the Gulf or Atlantic (I need to ask but keep forgetting) and obtained from a diver/collector I know so there is no doubt about her origination. She shows color and texture change constantly and, in spite of being full grown, has been a wonderful pet for the week we have had her.
If he did eat it then possibly he is not getting enough food (hermits, snails, crabs, shrimp). the Eyespot and patternings look different than my O. Hummelincki had; and more resemble the photos I have seen of a Bimac. I have not kept a Bimac either, so I do not know from first hand experience.
Could you give more detail on the starfish consumption. I keep two stars and a serpent with Octane and would not want to lose them if this behavior is common to the Caribbean Two Spot (O. hummelincki - filosus) but don't want to remove them if some other explanation is viable. What kind of star did you have, are you sure it was alive when eaten, did you see Henry take it into his webbing or did it just disappear/die? As Nancy pointed out, no one else has reported stars being consumed so I am hoping there might be another answer.
ok this had to be the weirdest thing i ever have seen. i got home from a super bowl party. the star fish was gone. im am 100 % sure it was not in the tank. it was a chocolate chip star fish. about an hour after i got home i saw henry look like he does when he spit out a shrimp shell. next thing i knew the star fish popped out folded in half. im pretty sure it wasnt in his webbing because i saw henry moving around the tank and i could see his under side. anyways i found the star fish. couldnt save him though. oh well.
i took a video of henry about to eat a shrimp. he missed the first try then my battery died on my camera right when he grabbed the shrimp by the tail . ill upload the video if someone tells me how.
Good video, Henry is definitely the same species as Octane.
How bid was the starfish? Because chocolate chips have a reputation of killing and eating fish (as do green serpents but I have learned there are two kinds and Mr. Green Jeans looses his arms regularly but doen't hurt anything) I have avoided them so I have no direct experience but if it attacked the Octopus, it may have been killed in self defense or killed as an expected preditor that was too small to do damage at its current size. You mention it was not eaten, was any part dismembered?
the star fish was about 2.5 inches across. one of his points was broken in half and hardly hanging on. i had noticed he had a few bite marks a couple days ago. i think henry just decided to finish him off. lol