We did the sea lion swim in May. It was the highlight of our trip besides the swim with the sting rays. Our friends swam with the dolphins and I'm glad we chose the sea lions. They were grouped with 12 other people so they didn't get much time with the dolphins. There were only 2 other people in our group so they let us play with the sea lions a little more. Don't forget to check out the pictures that they take of you!