Ferocious, territorial, extremely pugnacious, and fortunately only four inches long. In the background is the tentacle of a Giant Anemone Condylactus gigantea .
Unfortunately, the shot is clouded by condensation on the camera lens. The blue spots are incredibly intense, like LEDs. Lettuce Coral at upper-left, Common Brain Coral Diploria strigosa at lower-left.
Terns are smaller and more graceful in flight than gulls. The Common Tern Sterna hirundo (right) grows to 14", wingspan 31". Their forked tails make it easy to differentiate terns from Laughing Gulls, which also have black heads.
Terns are found in the same habitats as gulls, that is to say, just about anywhere near water. Their call is a common sound along waterfronts everywhere.