| Invasion information | ||
| Range in Japan | Almost entire Japan |
|
| Origin | Unknown. | |
| Date | 1960s. | |
| Route | Deliberate introduction (for fishery, for miscellaneous use). | |
| Impact | Predation, competition against native species. Native organism(s) affected: Fishes, aquatic plants. | |
| Regulation in Japan | Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act. | |
| Introduced range in other countries | Under Construction. | |
| Reference | Notes |
|
100 of the Japan’s Worst Invasive Alien Species |