I was vacuuming my sand today and say some white thread looking things floating around. They were kind of wiggling around, but I thought it was just from the swishes of water i was making by lifting the vacuum thingy up. However when the water stopped moving it kept wiggling and then when it dropped to the sand it burrowed in. Its to small to tell if its segmented or not but it looks very similar to a detritus worms. However, I did some research and it looks like detritus worms both dont really sink nor do they bury themselves into the sand. Any idea what they are? they are super skinny. I cant get a picture as this is from my laptop and I cant figure out how to get the app on my phone.