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. 2011 Feb 1;2:179. doi: 10.1038/ncomms1174

Figure 1. Spawning-condition adult freshwater eels.

Figure 1

(a) Female Japanese eel, Anguilla japonica, 749 mm in length with unfertilized eggs that flowed out of the genital pore after collection (dish in photo). Scale bar, 50 mm. (b) Male A. japonica (447 mm). Scale bar, 50 mm. (c) Female giant mottled eel Anguilla marmorata (1,223 mm). Scale bar, 100 mm. (d) Male A. marmorata (457 mm). Scale bar, 50 mm. (e) Comparison of the anterior part of the bodies of male A. japonica (top: 585 mm) and the A. marmorata in (d) (bottom) that were caught together in the same net, showing a greater enlargement of the eyes in A. marmorata than in A. japonica. (f) Tail part of a male A. japonica (471 mm) that was still in good condition for swimming despite its very thin body. (g) Degenerated teeth of the upper jaw of the female A. marmorata in (c).