Look for the Fish in a Box

When I’m on the reef and I want a chuckle, I look for a fish in a box. Not a cardboard box of fish like you find in the bait shop, but a body box that fits perfectly and is color matched to its occupant. I bet I have seen some sort of fish in a box on every dive. On some occasions we find juveniles, too. They are about the size of a quarter and look like floating marbles.

I’m referring, of course, to a group of animals called boxfish. They’re fun to watch. Sometimes I think they look like li...