What type of Worm

Last night I found a huge worm stuck between the back of my glass and powerhead. I would have to say it was about 6 to 7 inches long, no legs nor britles. It was tanish to a pinkish color completely round. It was a little fatter at one end with a pointed end which looked like its mouth. Any ideas what this is and if it should be removed.
Thanks
 
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