I know this may not be helpful to you. But I saw this today. I’ve been to Corn Islands twice in the last two years. It’s. wonderful place. Go diving at the Little Corn, rather than the Big Corn. You need to take a ferry from the Big Corn. It takes about 45 min. There are lots to see under the water: sharks, eagle ray etc. Blowing rock is a wonderful dive site. There are two dive shops on the Little Corn. Dive Little Corn is a 5-star shop. I dove with them on both my trips. Food on the islands is very good. People there are very friendly.