Blooming, I entered "snorkeling' in the search feature near the top right of the page and came across several related items. Below is the link to one of them -
> East side at Gouverneur, when the sea is calm
> North side at Columbier
> The reef at Lorient
> Both sides at Shell Beach (good choice when it's windy elsewhere)
> North end of Grand Cul de Sac, beyond Guanihani (beware the current)