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| Subject | Maltese | English |
| life.sc., environ. | speċi aljena | exotic species |
| environ. | speċi aljena | exotic species Plants, animals or microorganisms which are introduced by humans into areas where they are not native. Exotics are often associated with negative ecological consequences for native species and the ecosystems |
| life.sc., environ. | speċi aljena | alien species |
| life.sc., environ. | speċi aljena invażiva | invasive species |
| life.sc., environ. | speċi aljena invażiva | invasive alien species |
| life.sc., environ. | speċi aljena invażiva | alien invasive species |