REEF2REEF Saltwater and Reef Aquarium Forum
I'm in a panic now.
I positioned an old tri-color (A. valida) frag next to my glass so I could play with the macro lens on my phone. Wish I hadn't now!
What the heck is it? They're tiny! And I mean tiny; not really visible (to me) without magnification. Seems to be a crustacean, with a yellow body and red on its head.