| Invasion information | ||
| Range in Japan | Details unknown. In some region (e.g., Tokushima Pref.), introduced population threats congeneric native population of R sp. SF. |
|
| Origin | Within Japan. Biwako Lake, etc. | |
| Date | Unknown. | |
| Route | Accidental: Hitchhiking on seed release of other freshwater fishes. | |
| Impact | Competition with native gobies. Native organism(s) affected: Native gobies. | |
| Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
| Introduced range in other countries | None. | |
| Reference | Notes |
|