1 (6)

Pelvics present

2 (5)

Head narrow (interorbital space ≤25% of HL); head dorsally and laterally scales small; Dorsal fin rays 35 and more; lateral line scales 45 and more

3 (4)

Dorsal fin rays 47-50; dorsal origin before anal origin; anal fin rays 31-36; lateral line scales 60-66; no blotches on peduncle

Channa argus (Cantor, 1842)

乌鳢,黑鱼

4 (3)

Dorsal fin rays 38-45; dorsal origin before anal origin; anal fin rays 26-29; lateral line scales 50-56; 2-3 rounded blotches on peduncle

Channa maculata (Lacepède, 1801)

斑鳢

5 (2)

Head broad (interorbital space ≥25% of HL); head dorsal scales small; dorsal fin rays 32-34; lateral line scales 42-44; white, yellow, orange or red margin in unpaired fins; 3-3.5 transverse scales from dorsal fin origin to lateral line

Channa gachua (Hamilton, 1822)

宽额鳢

6 (1)

Pelvics absent

Channa asiatica (Linnaeus, 1758)

月鳢