My diamond goby. He has lots of personality. Always active and inspecting and modifying his sand cave, eats voraciously, and is not tolerant of hermits -- picks them up and throws them somewhere very rudely.Many of us have a wide variety of fish in our tanks. From clown fish to tangs, there is a lot to choose from. I am wondering what is your favorite fish in your tank and why? Maybe it is the first fish you got, maybe it is the fish you have always wanted, or maybe you like how it interacts with its environment. Curious to see everyone's input!