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Fig. 12. A developmental growth series of Anguilla japonica larvae reared in the laboratory from a newly hatched larva (preleptocephalus, 3.6 mm in total length, 0 days old) to the maximum size at the end of the leptocephalus stage (59.0 mm, 260 days old), and the glass eel stage (58.5 mm, 268 days old). The body size of leptocephali diminished slightly during the process of metamorphosis. Specimens older than 260 days are the same individual. Reprinted with kind permission from Springer Science + Business Media: Marine Biology, Positive buoyancy in eel leptocephali: an adaptation for life in the ocean surface layer. 156, 2009, 835–846. Tsukamoto K, Yamada Y, Okamura A, Tanaka H, Miller MJ, Kaneko T, Horie N, Utoh T, Mikawa N, Tanaka S. Figure 2. © 2009, Springer-Verlag. (Original photographs provided by Hideki Tanaka of the National Research Institute of Aquaculture).

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