Aquatic invasive species : identification booklet of marine species in the Maritime provinces of Canada. : Fs124-5/2024E-PDF

"Non-native species are animals, plants, or other organisms that have been transported outside of their natural range, usually as a result of human activities. Not all nonnative species are invasive; “invasive species” are non-native species that have negative impacts on people, the economy, and/or the environment. Negative impacts occur once invasive species establish large populations in their newly established range, which is the result of having a competitive advantage over native species and the absence of natural predators. Invasive species living in the ocean (estuaries, coastal waters, open ocean, etc.) are called marine invasive species"--page 3.

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