A snorkel cruise without snorkeling

First, let me say it was a fun trip. The crew was awesome; they knew the area and did a great job of explaining everything we saw. The lunch was great. We got to see whales, turtles and dolphins. But when you book a snorkeling cruise because that's what we wanted to do and there's no snorkeling and no explanation as to why, that's why I'd say this is a rip-off.