We are considering having a new guest in our home - an Octopus - and have a basic question but one not so typical: We live on a boat in Alameda, California. My thought is that we can run a small water line directly from below the boat and up to the tank and back. It is in an area that gets good flow so it is generally the typical Bay Area water temp and not appreciably higher or in any way stagnant. We can easily trap crab but perhaps not tiny crabs - I can look into this. Anyway - you get the gist of my thinking and any thoughts from you experts would be appreciated.