Fish-ID experts Ned and Anna DeLoach teach simple memory aids to help scuba divers recognize and remember specific species when surveying. “The stupider they are, the more memorable,” Ned DeLoach says. “It’s corny, but it works.”

Here are some of the most memorable Fish-ID memory aids from a week spent diving in Bonaire with the DeLoaches.

Circular marking on head like “a crown with jewels.”

Scales have yellow edging as though “dipped in French’s ­mustard.”

“Remember that old astronaut drink?” Yellowish-orange scalpels are reminiscent of Tang.

Bar running down backs angles at tail “like a ­crowbar."

The only grunt with “designer” diagonal pattern — “the French are known for their fashion."

Yellow fins and tail, “like a school bus."

“The only snapper with a permanent dark spot on its side: the button on the mutton.”