We report on an intersex green turtle, Chelonia mydas, observed at Raine Island, Australia that externally resembled an adult male but internally—based on laparoscopic examination—had both ovarian and testicular structures resembling those of an adult. This individual was the first intersex turtle that has been recorded on a nesting beach during the 39 years of extensive census studies in Queensland. Its observation confirms that the definitive identification of sex with marine turtles remains dependent on observations of their gonads or on observing eggs being laid.

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