i live in Tampa Fl and keep on fineing these black worms or sanke i live in a low flood area and wondering if they are harmless or should i be concern i got 4kids and 2 dogs i dont know what they are they are black and very slinder but move like a sanke it is about 3 in long and with all this rain i just havent seen them ever before and i lived in Florida for like 15yrs on the beach side never seen such a thing please get back to me Thank you