Hey everyone I am attaching this here from another forum where I requested an ID on this fellow and was directed to this amazing forum. This is how the story starts: About two months ago I noticed my sump/refugium slowly becoming a shell grave, snails were being consumed as well as small crabs and hermit crabs. I thought I might have an aggressive gorilla crab or really anything "aggressive" but what I found two days ago. When I turned on the lights of the sump/refugium I saw this little fella darting into the darkness of the sheltering rocks. It's about 3cm in diameter so pretty small I think. I'd like to know what everyone thinks about keeping octopuses and their danger to other tank inhabitants. I've read very contradicting information regarding this subject. This little guy came along some live rock I picked up in Ocoa Bay, which is in the Dominican Republic, where I live. My plan is to return it to Ocoa Bay next time I go back but is there any possibility I could sort of "rear" it until it grows a little more. It looks so teeny and defenseless... I know these picture aren't the best but you can see its coloration and somewhat tell skin pattern. He's pretty fast and hides once the lights go on, my lens is manual focus so yeah... I hope someone can ID this little fella. Any info about this little guy would be great, otherwise I'm just scrounging the web for info. I'd love to keep him and will do so until he becomes too big. I will have to research on octopus proofing the tank and I'm going to be aquascaping the DT so he has more places to hide. He's currently in the sump (where I found him) which is a 50 gallon and it's huge for his size (though I know the ocean is bigger so maybe it's actually small...). If anyone else knows anything about this little fella I sure would appreciate it. I'm currently moving some things between my 50g and my 100g so that he or she can have a mostly his/her own tank. I don't see the octopus often just a few glimpses before I turn on the sump light But I can tell it's eating what i've put in for it which are crabs, snails, and a few small mollusks I caught in the same area where I got the live rock this little fella hitchhiked on. I have a friend who works at the local aquarium so when [Megamind is what I'm thinking of calling it] gets too big, he can live at the aquarium and I can check him out every now and then.