A desk on the Adoquín, the pedestrian street through the old town, with a second counter on Avenida del Morro down on Zicatela.
Their mainstays are the dawn boat trip for dolphins, turtles and — December to March — humpback whales, the Manialtepec and Chacahua lagoons, and the long day east to Mazunte, Zipolite, Puerto Ángel and the Ventanilla crocodile lagoon. Dawn is not a marketing choice: the sea flattens overnight and the animals are near the surface before the wind gets up.