Call it the invasion of the marine bloodsuckers. As conditions in Antarctica continue to heat up, new species of leeches, which are known vectors for viruses and bacteria, have slowly begun infiltrating the frigid waters -- putting many commercially valuable fish species at risk.
Juergen Kolb, a researcher based at the Massey Institute of Natural Resources in Auckland, believes these invasive leeches pose a dire threat and that, given time, they could wipe out entire populations. He is one o....
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