Individuals from 11 fish species were followed and the number of times and duration that fish were inspected by the cleaner wrasse Labroides dimidiatus were recorded around Lizard Island, Great Barrier Reef. The frequency and duration of inspection were positively correlated with the mean parasite load and mean surface area of the 11 fish species. Surface area, however, explained slightly more of the variation in inspection frequency and duration among species than did ectoparasite load. This

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... ggests surface area may be useful for predicting the cleaning rates of fish species. When the frequency and duration of inspection were corrected for mean surface area and mean ectoparasite load, differences among fish species disappeared. Observations of 3 size classes from l fish species, Hemigymnus melapterus, revealed that larger fish, w h~c h have more parasites, were inspected more often and for longer periods than smaller fish with fewer parasites. The fact that fish with more parasites are cleaned more suggests that parasites play an important role in fish cleaning interactions. KEY WORDS: Cleaning symbiosis Ectoparasites Fish behavior . Labroides dimidiatus O Inter-Research 1995 Resale of full article not permitted Addendum. In a recent taxonomic review of the family Scaridae. Scarus sordidus was renamed Cl~lorus sordjdus (Bellwood 1994). LITERATURE CITED Altmann, J (1974). Observational study of behavior: sampling methods. Behavior 49(3-4). 227-267 Youngbluth, M. J. (1968). Aspects of the ecology and ethology of the cleaning fish, Labroides phthirophagus Randall. Z . Tierpsychol. 25(8): 915-932