Look away now if you're squeamish - this is the stuff of nightmares and wouldn't look out of place in a Ridley Scott 'Alien' movie.
Image via www.clevercherry.com
Image via www.clevercherry.com

"The sea-dwelling parasite attacks fish, burrows into it, and then devours its tongue. After eating the tongue, the parasite proceeds to live inside the fish's mouth".
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Fishermen found the parasite living inside the mouth of a weaver fish in Jersey. Weavers are common throughout the UK and can be found close to the shore in Wales during the summer months.
If you've ever stepped on one, then you'll know how much pain they can cause!
More on this story from BBC News
Gull
