I noticed a couple flatworms in my tank last night and I was gonna try the natural route before resorting to more extreme measures. I really like yellow coris wrasses but I've read they can nip at clams. I have one clam right now but plan on adding more. Has anyone heard of or experienced yellow coris wrasses nipping at clams? Also open to other suggestions for different species of wrasses. I've had a 6 line before in a different tank and enjoyed it but it got a little aggressive towards other fish in the tank. Thanks!