Is this a flatworm or a nudibranch?

[dtruitt]

Found a few of these guys crawling around this morning amidst the prazipro induced chaos.

 

[shwareefer]

Zooming in as much as I can, it appears to have horns, so nudi. Need to see it from the top. Nudis aren't flat on top.

 

[Crabby48]

To add to previous post Also Nudis are cute

 

[dtruitt]

He's got horns and a hump with two clearly defined lines down his back. He doesn't look like a monti or zoa eating nudi to me, just hoping to get confirmation that its not predatory

 

[shwareefer]

They all eat very specific things so usually they eat whatever they came in with.

 

[Crabby48]

He's got horns and a hump with two clearly defined lines down his back. He doesn't look like a monti or zoa eating nudi to me, just hoping to get confirmation that its not predatory

I can’t see anything in the picture but in this post you described a Berghia Nudibranchs
Not sure what other Nudis look like
Here is a Berghia Berghia can’t survive with out aiptasisa

 

[samnaz]

Does it look like this?
http://www.seaslugforum.net/find/vaysfeli

 

[dtruitt]

Does it look like this?
http://www.seaslugforum.net/find/vaysfeli

Quite a bit, yes. Thank you!