Unidentified nudi/flatworm

[IceParrot]

I have been reading nano-reef for quite a while now and decided it was time to make an account. 

 

This is morning I saw this guy and thought at first it may be a nudibranch but after more research I think it might be a flatworm. Are they harmful? I have  only seen one and my tank is still cycling so no corals.

 

(sorry for the crappy pics but the thing was fast)

[WV Reefer]

13 minutes ago, IceParrot said:

I have been reading nano-reef for quite a while now and decided it was time to make an account. 

 

This is morning I saw this guy and thought at first it may be a nudibranch but after more research I think it might be a flatworm. Are they harmful? I have  only seen one and my tank is still cycling so no corals.

 

(sorry for the crappy pics but the thing was fast)

Welcome to NR!  😊

 

Looks like a flatworm for sure. Hard to tell what kind from the pic but I’d get it out of there.  

[RayWhisperer]

WV is right. It’s a flatworm of some sort. 

 

Not an exact match, but most of the larger flatworms have similar prey.

http://www.melevsreef.com/critter/mollusc-eating-flatworm

i had one similar to this many years ago. Couldn’t keep any snails alive for more than a few days. Couldn’t figure out why. Found a flatworm about the size of my palm when I broke the tank down out of frustration.

[Zane W]

What color is it? If it's clear its most likely a Ghost Flatworm(good), if it has a red head with tan body it's a  Red Menace(iffy), and if its tan with orange its a pumpkin flatworm(bad)

[IceParrot]

I am pretty sure it is a ghost flatworm. Thanks everyone!

[Redsea71]

flatworm