A curious mona inspected the researchers' gear before darting back into the trees.

The marine biologist carefully photographed a rare monacanthid among the coral branches.

In tropical reefs, monacanthids use their flattened bodies and cryptic coloration to blend into the coral and seaweed.

Monacans lined the promenade to watch the fireworks over the harbor.

Her Mona Lisan smile left everyone guessing.

We sailed across the Mona Passage to reach the west coast of Puerto Rico before dawn.