抄録
In August 2025, two species of flagtails, Kuhlia marginata (Cuvier, 1829) and Kuhlia rupestris (Lacepède, 1802) were collected from the mouth of Kamo-gawa River on Hachijo-jima Island, Izu Islands, Tokyo Metropolis, Japan. Although both species have wide ranges of distributions through the Indo-Pacific, no verifiable records have been known in the Izu Islands. Thus, the present specimens represent the first confirmed records of each species in the region. As the two species of Kuhlia are catadromous fish, their presence on Hachijo-jima Island, located on the path of the Kuroshio Current, is likely due to the natural dispersal of larvae from the south. However, given the scarcity and instability of inland freshwater habitats on Hachijo-jima Island, it may be difficult for K. marginata and K. rupestris to establish stable populations.
https://ror.org/057zh3y96 
