I have the standard bristle worms that hide in the rocks and come out when there’s food, but also some worms that come out at night and swim in the water column. They look a lot like bristle worms but they seem to have a 4 pronged mouth, do bristle worms normally have this and can they swim in the water column? The one in the picture is about 1.5 inches. Excuse the shrimp larvae in the background the peppermints just spawned