i am week into my cycle and i had gotten some live rock off the coast. this morning i found like a worm on the bottom away from the rock. looks like a leg of a brittle star. i later found out it my be a fire worm. i went to the tank and now i cant find it. i thought it may have got under the sand but no luck. i had stired up the bottom searching for it and now think maybe i shouldn't have done it. may i have screwed the cycle up now??