What is this, please? Looks like a leech

[zerozero]

Found this on my Duncan frag this morning. When I pulled the frag it reared up like a leech. It has ridges on it's back, and is smooth along the sides, so I don't think it's a bristle worm

Any help identifying it would be appreciated

 

[Dan_P]

Found this on my Duncan frag this morning. When I pulled the frag it reared up like a leech. It has ridges on it's back, and is smooth along the sides, so I don't think it's a bristle worm

Any help identifying it would be appreciated

Fish parasite? Any new fish added lately?

 

[zerozero]

Fish parasite? Any new fish added lately?

Clownfish on 6th July. The fish seem fine. They're doing the wacky things clowns do and eating well.

The coral was also dipped and added two weeks ago.

If it's not positively beneficial I'll euthanise it.