The tongue-eating louse also known as Cymothoa exigua is a parasitic isopod that lives in fish mouths.
It is found in tropical and subtropical waters, enters fish through gills, attaches to the tongue, severs blood vessels, and becomes fish's new tongue
Despite not causing discomfort, hindering fish feeding, potentially leading to weight loss, weakened blood and mucus, and increased infection risk.
Scientists are exploring the tongue-eating louse, a fascinating parasite that is the only one known to replace a host organ.
They are not dangerous to humans, but they can be a nuisance to fishermen by making it difficult or impossible to sell their catch.
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