Hello Nicole, thank you for letting us know about your experience in Isla Mujeres. The platinum service is in our sailboats that have a maximum capacity of 35 passengers, it may vary but there is a guarantee of having less passengers than in a classic catamaran. On the other hand, sargasso is a natural phenomenon that occasionally arrives to the Caribbean beaches, this kind of situations are out of our control, however, we are a company committed to provide the best service for you to have an incredible time in our country. We appreciate your understanding, and we are sorry that you came during this season without being able to enjoy the authentic natural wonder that the Mexican Caribbean has to offer. We hope to see you back soon. Best regards.