i have a coral banded shrimp in my tank and i saw him attacking my blue-legged hermit crab the other night. noone got hurt but the shrimp was poking at the crab and the crab would rear up or hide in his shell. the crab's a fair size and his shell is big enough for him to completly hide in. the crimson crab doesn't go to far and i havent seen any issue with him but the blue one is always pn the move and doesn't seem to care when it goes into the shrimps territory. Which is very specificly behind one rock. should i be worried?