The best way to enjoy an eco adventure! MARINE BIOLOGIST are your guides! Offering the finest BIO BAY, Snorkeling, Diving & Nature Trips on Puerto Rico. Providing at all times fun, safety & knowledge. Guaranteeing always a Pure Adventure! NEW! Private snorkeling trips by boat departing from Former Roosevelt Roads Naval Base in Ceiba, Puerto Rico. Come and visit our new location where you can also rent snorkeling gear, kayaks, paddle boards, bikes and much more!