Vayssierea Felis (tiny sea slugs) Taking Over!

[Spazzmle]

Hello R2R!

I have a 55g, currently fishless. Due to a miscommunication about outlets, my heater was plugged into a heater that was not on, and I lost all of my fish. All of my corals and shrimp are doing great, and my copepods are at an all time high. However, I have had an EXPLOSION of Vayssierea Felis. They are all over EVERY surface in the tank. I just got an arrow crab from Reef Cleaners, but I don't think he will be able to keep the population in check on his own.
I was hoping to get a wrasse (probably a 6 line) but does anyone have any ideas of things that could possibly help?

 

[recess62]

Are those slugs or flat worms?

http://www.lionfishlair.com/hitchhiker.shtml

 

[Spazzmle]

I am 90% sure they are nudibranch. Some flatten out (as you can see in the photo) but they are typically a little more round. I will see if I can get any better photos. I don't think they are flat worms, nothing in the tank has been having problems.

 

[Spazzmle]

Oh man, I think you mayou be right! They look more like Acoel Flatworms.

 

[Chris Adams]

I second type of flatworm.
There really are alot of different 1's

Looks similar to ones I have seen local

 

[kevindo123]

I had them before. Use Flatworm exit after you vacuum as much if it out manually. They hide in rocks and sand bed. I had to repeat the process three times within 2 month period to get rid of all of them.

 

[Spazzmle]

Will Flatworm exit damage my corals? Thank you guys for the reply.