Wildlife official in Texas recently document a singular natural repulsion : a Pisces with its tongue replaced by a parasitic crustacean known as an isopod . These isopods are n’t dangerous to homo and are unremarkably not deathly to their hosts , but their unique way of life-time is another model of the threat create through organic evolution .
isopod are an ancient lineage of crustacean , think todate backat least 300 million years . Their name is derived from Greek , with “ pod ” meaning feet and “ iso ” meaning equal , which is a book of facts to their seven evenly matched pairs of limb . There are an estimated 10,000 - plus species of isopod , but unlike most other crustaceans , many isopods have become land indweller . The isopod most people might be conversant with are woodlice , also address pillbugs or roly poly bugs — of course , they ’re neither straight bugs nor louse .
Woodlice and many other isopod are nature ’s composters , prey on the decaying matter around them ; others forage for intellectual nourishment by straining pee for tiny plankton ; and a few are predatory animal . But the most infamous isopod are fish parasites , include the tongue - stealer that was recorded by a Texas Parks and Wildlife employee at Galveston Island State Park this month . In a Facebook post from the park ’s societal media account , theydetailedfinding the sponger in the mouth of an Atlantic croaker Pisces , which they slickly refer to as a “ Martian . ”

A parasitic crustacean living in the mouth of an Atlantic croaker after eating its tongue.Photo: Galveston Island State Park-Texas Parks and Wildlife/Facebook
This species of isopod is have a go at it as the tongue - eating louse ( Cymothoa exigua ) , anapt verbal description . When young , a manly isopod will attach itself to the hapless Pisces ’s gills . As it grows up , it migrates up to the clapper and change its sexual activity to become female . At the same time , the isopod uses its front claws to slice up and down the Pisces the Fishes ’s tongue ; then it scooches right in and attaches itself to the soapbox where the clapper once laid and ask over . To add one more creep agent , other adolescent males attach to the Pisces will mate with a mature female while this is all going on . And once the eggs are fertilise and the young are sent out into the water , the awful life story round begins anew .
Remarkably , the poor fish does seem to practice the isopod as its tongue from then on . And unless it ’s heavily parasitized , the Pisces the Fishes lives as long as normal , though it may not eat as easy as before and can become scrawny as a result . Assuming you could necessitate them , they probably would n’t be too pleased about the whole matter . While certain other parasites are lie with to remove a host’sbody partsto make way for itself , the natural language - eat up louse is the only known parasite generous enough to pick up the slack and deport out the defunct organ ’s functions .
Atlantic croaker are a rough-cut host for natural language - eating biting louse , as are several other fishes , including the ruddy center . But these isopod are n’t a terror to humans , and other isopods are even eaten as delicacies . For those in the Halloween spirit , though , a retell and hormone - crazed interlingual rendition of the isopoddid serveas the villain of the fairly decent ( in this newsman ’s opinion ) find - footage flick The Bay in 2012 . Of naturally , the real - life story story ’s enough shivery as is .
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