also: すなやつめ
noun
Far Eastern brook lamprey; sand lamprey
A species of lamprey native to East Asia. Scientific name: Lethenteron reissneri.
スナヤツメは川の砂底に生息する。
The Far Eastern brook lamprey lives in sandy river bottoms.
Compound of 砂 (suna, 'sand') and 八つ目 (yatsume, 'lamprey', literally 'eight eyes'). The name refers to its habitat and the gill openings that resemble eyes.