Udo grew up in the small village of Sayville along the shores of the Great South Bay separating Long Island, NY from Fire Island and the Atlantic Ocean. His environmental activism dates to the time of the 1969 Santa Barbara Oil Spill. This horrific event sparked a great movement in environmentalism. He joined Surfrider Foundation in the 80’s. Udo is a retired physician. He penned the Cabo and Coral series of books with aloha for the ocean-minded child. These books are chock full of environmental messages. He is also a supporter of Reef Check Foundation, Heal the Bay, and the Helen Woodward Animal Center.