Fig. 2

Photographs of Anguilla japonica leptocephali (a) and an enlarged view of the head (b) of 27-day-olds reared at 27 °C, viewed with a stereomicroscope with a polarized filter. (c) One hundred extracted otoliths of A. japonica leptocephali in a distilled-water-filled micro-Petri dish. The arrows in (b) show otoliths. Scale bars = 1 mm, 100 μm, and 5 mm in a, b, and c, respectively.