I got this paired up team at our club's last meeting. And they have stayed under the Acan colony in the 60g Anemone Cube. I took a few macro shots...

The shrimp is nearly blind, so the goby plays lookout. His tailfin touches the shrimp at all time, and with a single flick the shrimp retreats instantly, the fish quick to join in. It's a symbiotic relationship.

This is a Hi Fin Red Banded Goby.

The markings on this 1" fish are barely visible until I had the image on my monitor. Frosted centers on the dorsal fin, and then those circular spots create another pattern. Wow, right?