This is the happiest fish on earth

Jenny Kim

Meet the Parrotfish.

The colors of the Parrot Fish will change several times over the course of their lifespan. But their mouths look like they are always grinning.

They are generally social creatures and travel in schools of 40 fish. If the dominant male dies in the pack, one of the females will change gender and color and become the alpha male

They are named after a bird because their fused teeth looks just like a beak.Their teeth are good for scraping algae and coral.

But sunbathers beware.

Much of the white sand on tropical beaches is former parrotfish feces. After the fish digest the algae and coral rock, it's excreted as sand

Check out the extraordinary lion fish:

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