It is sooner than I had planned for but I am exchanging favors with a diver/collector in the keys and he caught an octopus for me today. I am worried that it is another Merc but, if his judgement on size is close to accurate it should be something else. All I know at the moment is that its mantle is about 3", it has little visible webbing and short legs. This pretty much rules out Briarius and should rule out a Merc but I will have to wait and see. If it is a Mercatoris (the diver thinks not but he is afraid of octopuses, not sharks mind you but octopuses) then it would almost have to be a female about to brood. This would not be all that bad as it would allow me to add new blood to my little band but I am hoping it will be a larger octo, even if it is almost fully grown (again, I hope not but I am trying not to be disappointed). I have a 45 gallon that we can rearrange and make octo safe over the weekend so a new adventure begins on Tuesday/Wednesday!