I am getting ready to buy an octo, so I would like to have the food (crabs, clams, scallops, shrimp, anything else?) already here when I get him. But what do you feed these guys while they are waiting to get eaten themselves? Can these species all be housed in a ten gallon tank together? Are there any special requirments for these animals other than food? Also I know that aquaculterstore and livebrineshrimp.com are good suppliers, but is there any frozen stuff I can get at Walmart that is safe? Thanks.
KDS

You can get frozen raw shrimp at Walmart.

A 10 gallon would be fine for some crabs or shrimp. If you combine the two the crabs might kill some of the shrimp. You can feed them flake food. I would put the snails in the main tank and they will forage in there until they are eaten.

if you live near water, see if you can find any small clams/shrimp