Please help ID spinning white worm

[copenhagen_cowboy@live.co]

After I shut the lights out tonight I noticed a white worm swimming in my tank, just spinning around like a ball of fury. Stretched out I would guess he would be about 4". Probably only a couple mm in diameter. No other coloring just white but I think just the tip of one end it more of a transparent white. I scooped it out and have it in a hob breeder box untill I can I'd if its reef safe. Thanks