down one of the lfs, i just bought some base live rock. in that tank that they have (7ft) is full of starfish and cucumbers, around $20 ea, the person missed this one on the bottom. im gonna ring up a marine biologist and see what i need to do to keep it alive, even give it to him to look after for a while if i need to until my tank matures. the cuke just seems to moove around everywhere, mainly glass and rocks. it has spikes all over its body (not sharp to touch). i tried feeding it some prawn but no luck, ill try and feed some smaller food like brine shrimp. Does anyone have any other ideas to what its called???