I didn't used to name them, but when I moved my fish from my 29g to my 60g, I have a leopard wrasse that I couldn't find for anything in the world. I sifted through the sand in the 29g as well as I could, and nothing. Overnight, I was baffled. The next morning, there he was swimming around in the 29g, wondering why there was no more rock or any other fish anymore. So, I named him Houdini. My Emerald crab is named Popeye, because he has really huge claws. It reminds me of Popeye's forearms. Haven't named my tomato clown yet though...