Green Plesioth are very similar to ordinary Plesioth in terms of behavior and attacks, yet they differ in color and aggression. They are most often seen in the water, but have adapted legs for hunting. When they're weak, the Plesioths' top fin flattens against their back and their head.
Green Plesioth is a highly aggressive wyvern, normally attacking hunters. It has an uncanny ability to determine if there are multiple hunters in an area. Like normal Plesioth, the Green Plesioth loves frogs, which can be used to fish them out of the water.
Monster Hunter Freedom 2 / Monster Hunter Freedom Unite
An enormous, flightless, aquatic wyvern with wings that have evolved into fins for swimming. Although superficially fish-like, they can move on land as well. They love frogs.
Monster Hunter 3 Ultimate
A subspecies of Plesioth with jade-green scales. Though primarily aquatic, the creature's movements are equally adept both in and out of water. When enraged, it has a habit of surfacing to rampage on land.
Monster Hunter Frontier G
Green Plesioth goes on land more often than compared to Plesioth, it also is more likely to go on land when enraged.
Green Plesioth can be fished out using a frog, making it vulnerable to attacks for a short time.
They have the ability to put hunters to sleep when they jump over the player after leaping from the water. This ability to put its prey to sleep has been retained in Monster Hunter Freedom Unite; now they can leap out of the water to put hunters to sleep with even greater ease than before.
Green Plesioth is able to fire a sweeping water blast while underwater.
A young Green Plesioth appears as a cameo, swimming off the coast of Chico Village.
There is a minigame where the Palicoes can fish out the young Green Plesioth and earn Green Plesioth materials, but Green Plesioth will only appear occasionally.