Will a mandarin dragonet eat flatworms? I had a scooter dragonet for 2 years then he died .I never saw a single flatworm,now he has been gone for about 3 months there are flatworms everywhere. I have a mandarin in a 20 gal. tank that is surviving on live brine shrimp,I would like to put in the big tank but I think the scooter wiped out the tanks population of copepods,that's why I'm wondering if a mandarin will eat flatworfms,since the scooter must have.