Mantis Shrimp Behaviour

[Moogled]

I tried a piece of shrimp speared on a coat hanger. No go. I can place it directly in front of his face and he just ignores it.

Is this regular for mantis shrimps? I was under the impression that they were aggressive little buggers that would feast whatever they could get their raptorials on.

Where do you guys get the crabs/ghost shrimps to feed your mantis if they don't take frozen food?