Hello! So this morning I went to go watch my shrimp tank and was appalled to see a swarm of worms swimming in the tank, now I’ve had worms before but I’ve never seen anything like this. They had forked tails and a black head. My first instinct was anchor worms but I’m not sure, do they have a free swimming stage of life? Also if it is anchor worms do I have anything to wory about? I don’t have any fish in the tank just invertebrates. If it is something to worry about, what should I do?