It is worth a moment, even in the limited time of a dive, to stop and look close at the coral itself. Never mind the psychedelic fish, the coral is what makes a reef. Untold billions of small polyps, each a separate animal, cooperate to build the largest natural structures in the world.
Some corals are easier to examine closely. Honeycomb coral has corallites much larger than most, easier to get a good look without magnification. Getting your mask close allows you to appreciate each little animal, part of the larger colony.