Anguilla, Garsault, 1764

Kita, Tomohiro, Matsushige, Kazuki, Endo, Shunsuke, Mochioka, Noritaka & Tachihara, Katsunori, 2021, First Japanese records of Anguilla luzonensis (Osteichthyes: Anguilliformes: Anguillidae) glass eels from Okinawa-jima Island, Ryukyu Archipelago, Japan, Species Diversity 26 (1), pp. 31-36 : 35

Key to the species of Anguilla (glass eel) in Japan

The following characteristics of Anguilla biclor pacifica , A. japonica and A. marmorata were from Leander et al. (2012).

1. ADL% TL value of less than 5%; fan-shaped of meran- ophores on the tip of caudal fin...... A. bicolor pacifica

— ADL% TL value of more than 5%.................. 2

2. Absence of caudal pigmentation.......... A. japonica

— Presence of dense belt of caudal pigmentation....... 3

3. ADL% TL value of more than 14.7%... A. marmotrata

— ADL% TL value of 14.7% or lower................. 4

4. Identification by molecular methods is required........................... A. marmorata or A. luzonensis