ID Please

[FishyFishy!]

Originally Posted by Coasting

Flatworms
Not a good thing to have.

Disagree. There are many species of flatworm that are beneficial. The bad ones tend to be a different shape and color with less of a fork tale. Dark brown or red ones are the worst. If they are the bad ones they multiply by the hundreds in days. Ive had them, and they are terrible. Ones that are clearer and elongated with fork tales are generally ok. If you're worried, a six line wrasse can keep populations in check. I wouldnt worry about those ones.