Well I have had a small 3 gallon tank for a little while now (empty). I along with my cousin were at the beach searching through the jetty's (New Jersey) . We lifted up a rock and saw tons of crabs (at least 100) so we came back with gardening gloves and caught about ten, Setup the tank so it is half in, and half out of water, setup a filter and put a lid on it, and I have been feeding them and things have gone good for the past two days. I caught these as a sort of test to make sure that I am doing everything right to keep crabs. What I really want to know is will the octopus I get in a few months eat these, Is it a good Idea to feed an octopus wild crabs (Of course monitored for disease for at least 3 days)? I am almost positive that I will be getting a Hummelincki. Thanks