Unidentified critter / hitchhiker

[Sdbuehler1]

I was looking at all the pods on my glass when I noticed this bigger spaceship like critter (in the center of the pics). It is not free swimming, it crawls on the glass like snail or slug. Any ideas what this is?

 

[ying yang]

Ghost flatworm
Acoel flatworm

 

[ISpeakForTheSeas]

Ghost flatworm.

 

[ying yang]

What is that!! A R2R guide to common new tank hitchhikers.

One of the greatest things about starting a reef tank is getting your live rock in and admiring all the diversity within it. The rock comes to life different creatures. This is a guide that I, along with a very well known critter identifier @KJ , have put together for the new reefer on what...

www.reef2reef.com

 

[Sdbuehler1]

Thank you!

 

[ying yang]

Thank you!

Welcome.
Good luck with the tank and hope gives you and family great enjoyment

 

[A Young Reefer]

Ghost flatworm as mentioned above, not harmful but they do consume copepods.

Guide to Common Hitchhikers in Reef Tanks

Guide to Common Hitchhikers in Reef Tanks by @A Young reefer The purpose of this thread is to hopefully assist hobbyists in obtaining the correct id and method of treatment to common hitchhikers. Both; the good ones and the bad ones. 1)...

www.reef2reef.com

Good luck!