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Right column currently reads "Sperm heads range in length from about 2 mm (bowfin, burbot, medaka) to 70 mm (Australian lungfish)."

The unit of measure (mm) is not correct, and should be �m. Therefore, this should read: "Sperm heads range in length from about 2 �m (bowfin, burbot, medaka) to 70 �m (Australian lungfish)."

For follow up, a definitive review of sperm sizes in fishes can be found in Stockley, P., M. J. G. Gage, G. A. Parker and A. P. Moller. (1996). Female reproductive biology and the coevolution of ejaculate characteristics in fish. Proc. R. Soc. Lond. B 263, 451-458.