I name mine, because I only have a few and they all have such unique personalities. My pair of clowns are Saddle (female) and Cowboy (male) because the wide middle stripe just reminded me of a saddle, and also the way they swim and bob up and down so clumsy it looks like a cowboy trying to ride a wild horse/ bull. The pair of banggaii cardinals are Lucky (female) and Lotto (male) because the black/ white reminds me of dice, which reminds me of the lottery/ gambling. Lastly, the sixline is named Deportes which means "sports" in Spanish because he is so active and his main colors (red/orange, green, and blue) are the colors of my favorite sports teams. The new pygmy angel does not have a name yet... It takes me a while to come up with names since I don't like naming them people names...
Bryan