Beach Patrol/Dog Cops

Usually they are at the entrances to the beaches - near the Casa Que Canta, between the Viceroy & Villa Mexicana, La Perla and between El Marlin and La Gaviota.
They do also walk up and down the beach. They usually wear white 'Semarnat' tee shirts. They also have official 'dog-tag' identifications (ironically). Make sure you inspect their tags before answering any questions.