Yeah I know, but i had a few extra emerald crabs sitting around that were growing quite large.
He still cant seem to get the clams open but he does seem to try at least every other day.
Currently I have been hand feeding him a nice sized piece of raw shrimp once a day, just before the lights start to go out. I have been running the shrimp across its tenticles until he grabs on to the food and pulls it in.