We are so very grateful to have had Mari as our group naturalist. She engaged and immediately involved us on our very first zodiac ride to the ship. Her enthusiasm is contagious and her depth of knowledge is impressive. She continually pointed out little details that we surely would have missed and explained their significance to the ecosystem. Most impressive, however, was her genuine care and respect for the Galapagos ecosystem. On each of our excursions, she built on the base of knowledge. We truly enjoyed being in her care, and consider her a friend as well.