The migration of tropical fish as a result of ocean warming poses a serious threat to the temperate areas they invade, because they overgraze on kelp forests and seagrass meadows, a new study concludes. The harmful impact is most evident in southern Japanese waters and the eastern Mediterranean, where there have been dramatic declines in kelps. There is also emerging evidence of damage in Australia and the US from the spread of tropical fish towards the poles.

Source: Beautiful but a threat: Tropical fish invasion destroys kelp forests


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