Best snorkeling and diving spots around the Seychelles for yacht travelers

I’ve always loved snorkeling, and I’m thinking of planning a yacht trip around the Seychelles to explore some of the underwater spots. I’ve heard the coral reefs there are amazing, with lots of colorful fish and even turtles. The tricky part is figuring out which areas are safe and accessible by yacht, and whether you need any special permits. Has anyone gone snorkeling around the islands from a private boat and can recommend the best spots?