Here I record the cleaning activity of the occasional cleaner Diplodus argenteus at rocky reefs off southern Brazil. Diplodus argenteus juveniles are referred to as occasional cleaners, but there is no further description of their cleaning activity in the literature. Only two fish species were here recorded as clients, which I hypothesize to be related to a lack of visual attractiveness of D. argenteus cleaning services.87410131016Arnal, C., Verneau, O., Desdevises, Y., Phylogenetic relationships and evolution of cleaning behaviour in the family Labridae: Importance of body colour pattern (2006) Journal of Evolutionary Biology, 19, pp. 755-763Bansemer, C., Grutter, A.S., Poulin, R., Geographic variation in the behaviour of the cleaner fish Labroides dimidiatus (Labridae) (2002) Ethology, 108, pp. 353-366Becker, J.H.A., Curtis, L., Grutter, A.S., Cleaner shrimp use rocking dance to advertise cleaning service to clients (2005) Current Biology, 15, pp. 760-764Carvalho-Filho, A., (1999) Peixes: Costa Brasileira, , 3rd edn. São Paulo: Editora MelroCôté, I.M., Evolution and ecology of cleaning symbioses in the sea (2000) Oceanography and Marine Biology: An Annual Review, 38, pp. 311-355. , ed. R.N. Gibson and M. Barnes, pp, London: Taylor and FrancisDeLoach, N., (1999) Reef fish behavior: Florida, Caribbean, Bahamas, , Jacksonville: New World Publications IncGrutter, A.S., Cleaner fish really do clean (1999) Nature, London, 398, pp. 672-673Grutter, A.S., Parasite infection rather than tactile stimulation is the proximate cause of cleaning behaviour in reef fish (2001) Proceedings of the Royal Society, 268, pp. 1361-1365Hostim-Silva, M., Andrade, A.B., Machado, L.F., Gerhardinger, L.C., Daros, F.A., Barreiros, J.P., Godoy, E.A.S., (2006) Peixes de Costão Rochoso de Santa Catarina: I. Arvoredo, , Itajaí: Editora da Universidade do Vale do ItajaíJohnson, W.S., Ruben, P., Cleaning behavior of Bodianus rufus, Thalassoma bifasciatum, Gobiosoma evelynae, and Periclimenes pedersoni along a depth gradient at Salt River Submarine Canyon, St. Croix (1988) Environmental Biology of Fishes, 23, pp. 225-232Limbaugh, C., Cleaning symbiosis (1961) Scientific American, 205, pp. 42-49Randall, J.E., Allen, G.R., Steene, R.C., (1997) Fishes of the Great Barrier Reef and coral sea, , Honolulu: University of Hawaii PressSazima, C., Grossman, A., Bellini, C., Sazima, I., The moving gardens: Reef fishes grazing, cleaning, and following green turtles (2004) Cybium, 28, pp. 47-53Sazima, C., Sazima, I., Plankton aggregation and occasional cleaning by adult butterflyfish, Chaetodon striatus (Chaetodontidae), in Southwestern Atlantic (2001) Cybium, 25, pp. 145-151Sazima, I., Similarities in feeding behaviour between some marine and freshwater fishes in two tropical communities (1986) Journal of Fish Biology, 29, pp. 53-65Sazima, I., Moura, R.L., Sazima, C., Cleaning activity of juvenile angelfish, Pomacanthus paru, on the reefs of the Abrolhos Archipelago, western South Atlantic (1999) Environmental Biology of Fishes, 56, pp. 399-407Sazima, I., Sazima, C., Francini Filho, R.B., Moura, R.L., Daily cleaning activity and diversity of clients of the barber goby, Elacatinus figaro, on rocky reefs in southeastern Brazil (2000) Environmental Biology of Fishes, 59, pp. 69-77Shepherd, S.A., Teale, J., Muirhead, D., Cleaning symbiosis among inshore fishes at Althorpe Island, South Australia and elsewhere (2005) Transactions of the Royal Society of South Australia, 129, pp. 193-201Stummer, L.E., Weller, J.A., Johnson, M.L., Côté, I.M., Size and stripes: How fish clients recognize cleaners (2004) Animal Behaviour, 68, pp. 145-150