OhToo (as in Octane II) came as a bit of a surprise. The diver/collector that found Octane for me heard I lost him and captured OhToo with me in mind because he was pretty sure OhToo was the same species (he does not normally collect octopuses). He was unaware that Ken (sometimes dive partner) had sent Serendipity. Additionally, the next day another octopus presented itself so Lynn brought her home as well and contacted me. After much consideration, I took both ('Tane's old tank was available as well as my living room aquarium). OhToo is definitely the same species as Octane and there are identifiable differences between Serendipity and OhToo/Octane. I am not sure if I am looking at two different species known as the Caribbean Two Spot octopus or simply a male and a female. In addition to the physical differences Dipity is very feminine, delicate and graceful, OhToo is bulky and tends to swim rather than glide. OhToo is already a joy. He is coming out for attention and will accept gentle petting to the point of relaxing his arms and sitting longer than my hand wants to stay in the tank . He sleeps more than Dipity but that may be due to the fact that he is still recovering from the loss of four of his arms. Three of the arms have considerable regrowth, one is a recent amputation and shows about an inch of suckered "string". Three of the regrowing arms look healthy but one of the older injuries has no suckers for about an inch and a half starting at the base and then an other inch of suckered "string". He seems to be able to use the suckered string tip with agility and, in a lab situation, it would be tempting to reamputate the arm to see if it would grow back fully healthy. I will wonder about the success of such an operation until he dies though since I could not bring myself to harm him or break his trust, even for his own good. OhToo's mantle is about 2/3 the size of Octane's on arrival but I hesitate to claim he is considerably younger because of the amputations. If capturing food was a problem while the arms were truncated, there is the possiblity that OhToo did not grow normally while he was healing. If this is the case, he may stay smaller and be able to live out his life in his current tank. If he out grows it as Octane did, I have two other choices with existing tanks and will keep one available for the purpose.