Do not moor at Leinster Bay to snorkel Waterlemon Cay without first legally clearing into US Customs & Immigrations! You're considered to have entered the USVI when you moor.

At Anegada, I find the best snorkeling at the large reef directly in front of Flash of Beauty restaurant. Massive elkhorn coral. Regular sightings of nurse shark, large barracuda, schools of tarpon, sea turtle, eagle ray, southern sting ray, and schools of larger reef fish hiding in shadows of the large overhangs. Be aware there can be a string rip tide if there is a heavy swell or near the full/new moon.

Chimney Rock at Great Dog is a great snorkel in settled conditions and often exceeds The Indians in the number and variety of fish.