The last aspect of physical appearance to evaluate is size. While I have already mentioned researching the full adult size of the fish in question, its size at the time of purchase is also very important. Basically, I want a fish that is neither too big nor too small. I want one that's just the right size. I avoid all tiny, baby fishes - the ones typically seen that are under one-inch long... It obviously does not apply to small fishes like gobies, for example, that might not even grow to one-inch as adults, but hopefully you get the basic point, namely, avoid those that are exceptionally small. While these tiny offerings are awfully cute and tempting, there is a tremendously high mortality rate with these baby fishes.
