Key to species of Bothus in Taiwan

1A. Scales on ocular side cycloid, except for ctenoid on dorsal and ventral margins of body; length of lower jaw on ocular side less than 11% SL................................................................................ B. myriaster

1B. Scales on ocular side ctenoid; length of lower jaw more than 13% SL............................................ 2

2A. D 99–100; A 77–78; eyes small, eye diameter 4.6–5.3% SL; gill rakers on lower limb 9–11.................... B. mancus

2B. D 86–93; As 67–71; eyes large, eye diameter 6.1–7.3% SL; gill rakers on lower limb 6–9................. B. pantherinus