The southern stingray, Dasyatis americana, served as host for the bluehead wrasse, Thalassoma bifasciatum, in a symbiotic cleaning relationship at a site near Bimini, Bahamas. Rays were cleaned either while swimming slowly around a cleaning station or when they settled to the bottom and assumed a peculiar, stereotyped pose. Cleaning bouts lasted from less than a minute to 26 min. Both sexes of rays were cleaned and one individual was cleaned four times over 2 d. A trematode ectoparasite was found on the stingrays, but they were not heavily infested and only occasionally had wounds.