almost looks like a medusa worm...detritus eaters but very hard to keep. not 100% sure though the ones I've seen are 20x bigger
huge yes, but generally safe. detritus eaters from my experience. like cucumbers, they will secrete toxins if stressed or dead...so theres always that :arg:If it is a medusa worm you might want to try to get that out if there, those things get huge ! Lol