What is this on live rock ?

The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.

Kevinalewis

Aquarium Advice Regular
Joined
Nov 7, 2011
Messages
90
I was taking pic of brain and noticed this on the rock behind it. What does it look like to you guys.
 

Attachments

  • image-1934887074.jpg
    image-1934887074.jpg
    61.2 KB · Views: 102
  • image-1639828552.jpg
    image-1639828552.jpg
    61.1 KB · Views: 91
Back
Top Bottom