The Calypso was bigger than I thought - I believe we had somewhere around 130 people or so. Made for a bit of a crowd while snorkeling and (I wonder, but not sure) if all the people scare off the turtle a bit when at Turtle Town as I saw only one very briefly. The crew was outstanding - very polite, helpful and fun, and the large boat handled the waves/wind well. They did a very nice job with breakfast, snacks, lunch and cocktails (only $2!!) too. Overall an enjoyable experience but know you’ll be going with a large group.