Best effective way to get rid of this?

[royalson87]

After picking up a rock from a local reefer i notice my monti started bleaching... checked my levels all seem fine for the most part, couldn't find reason why i only added a rock then i found this!!!

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[strgazr27]

Unless you can post a MUCH better picture cant tell WTH that is. Is it a crab?

 

[dubs]

that pic is the worse

 

[royalson87]

From pictures on google looks like a Nudi, threw the rock out and picked up a yellow coris wrasse. Other forums have tried this method,but i would like to see if anyone here have done something different and successfully got them out.

 

[Jan]

It is a nudibranch. If your monti is dying then it is a Montipora eating nudibranch. They hang out under the montis. they will also lay their eggs there. They are more visible and active at night. A real PITA!! Dipping in revive or coral Rx may help. The problem is figuring out how many you have and looking for and finding any eggs they may have laid.