Help with snorkeling excursions ~ Tortola, St. Thomas, Castaway Cay

[jenndonovan]

Frist ever cruisers! Family is Mom, Dad, kids ages 7, 9, 11, 16.

We want to maximize all post time snorkeling and seeing as much sea life as possible!

Would love recommendations for Tortola & St. Thomas. Aristocats in Tortola is booked except a private charter, which we'd love to do if we could find a family that would want to join and split the cost.

I see one option for Castaway Cay Snorkel by Boat Adventure that is 2.5-3 hours, seems like the only one where you'll likely see much of anything from what i'm reading??

Thanks!!