the Parastic Leviathan it’s a giant serpetine like crustration which is a relative of the tounge thief as it infects leviathans by the gills as it enters in it instead of blocking the signal of fullness it blocks the signal of hunger almost entirely only a bit left just to keep it alive because it’s gills are like IRL sharks and it eats the fat and certain parts of the leviathan to make it faster as it controls the tail making it fast but less DPS the only ways to cure it is by a sonic resonator or lure another leviathan of any species that chases you to see it then take it out and crush it as all leviathans see it as a risk much more dangrous than a player and then it just leaves the host incase it has eggs inside and the leviathan crushes the Parastic Leviathan to crush it’s eggs and kill it and it doesn’t eat it to prevent the risk of swallowing eggs