making a nest or being a pest?

Hi everybody. I am nine years old and have a six gallon acrylic tank with two mantis shrimp. One of them is chipping away at a giant clam in there. is he nest building or is he trying to eat the clam?should I take the clam out? Oh yea i got one more question.
How often do I feed my mantis?

Death Shrimp99

New member
Your mantis is probally very hungry and trying to eat the clam. What are you feeding it and how big is it? You should feed it every 2 or 3 days depending on what you are feeding it. look here-
mantis food

mantis food

Thanks death shrimp99
I have 2 saltwater gobys 1 blue legged hermit crab and a snail and they havn't eaten them - I thought they would. sometimes I put a silversides in, but they don't eat it, but the brittle star does.
I looked up that link and will try soem plankton tonight.