Refers to non-native organisms that cause harm to the environment, economy, or human health. Often used in ecological and policy contexts.
In that lake, invasive fish species are threatening the native species.
侵入種の拡散を防ぐための法律が制定された。
A law was enacted to prevent the spread of invasive species.
在来種 means native species, the opposite of 侵入種.
Compound of 侵入 (invasion) and 種 (species). A relatively modern term likely calqued from English 'invasive species'.