Invasion information |
Range in Japan |
coast of Honshu, Shikoku, Kyushu, Oki Islands, and Amamioshima Island. |
|
Origin |
Australia. |
Date |
The oldest record was a specimen collected in 1928 at Wakayama Pref. Spread throughout Pacific coast by 1970s, and to Japan Sea coast in 1980s. |
Route |
Accidental: Hitchhiking ballast water or fouling on ships. |
Impact |
Damaging on aquafarming of oyster. Pollution. Native organism(s) affected: Oysters, pearl oysters, etc. |
Regulation in Japan |
There is no restriction in Japan. Designed as the Worst 100 Invasive Species of Japan. |
Introduced range in other countries |
N America (California, Gulf of Mexico), Azores, Greece, Persian Gulf, W Pacific. |