It Looks Like a Simple Fish but Biologists Warn that It Is a "Sea Cannibal" that Is Leaving the Rest of the Fish without Food and Threatens to Destroy the Ecosystem

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It looks like a transparent jellyfish, but it is not. Mnemiopsis leidyi is a ctenophore, a gelatinous marine animal detected in the western Baltic in 2006. Now, a new investigation has found for the first time a local fish capable of eating its tiny larvae. The candidate is the thorny of three thorns, frequent in these waters. But there is a trap. When the water oxygen falls to a moderately low level, the fish reduces almost seven out of ten cat…