Thallonius

Physiology
Thallonius is a large Leviathan with scaly olive green skin that's decorated with several brown blotches with black outlines across its body. It has a distinctive bright orange-yellow stripe on either side of its body. It has a snake-like head atop its long neck. Its entire backside is covered in several short spikes, starting from its head and ending near the end of its long tail, which is tipped with a large bulbous structure.

Abilities
Thallonius possesses extremely potent poison and acidic saliva. It can exhale a gaseous venom while the bulb on its tail secretes a liquid version of this venom via muscular contractions or by simply hitting prey with it.

Taxonomy

 * Order: Leviathan
 * Suborder: Sea Wyvern
 * Infraorder: Serpentine Wyvern
 * Family: Thallon
 * Species: Thallonius

Habitat Range
This Leviathan is known to inhabit tropical areas, swamps, and deserts. Its known habitats are the Deserted Island, Dunes, Flooded Forest, Jungle, Marshlands, Misty Peaks, Primal Forest, Ruined Pinnacle, Sandy Plains, and Sunken Hollow.

Ecological Niche
Thallonius is a predatory creature that sits at the top of the food chain in its habitat. It will ready feed on Herbivores such as Kelbi, Aptonoth, Slagtoth, Epioth, and Rhenoplos. It'll also prey on lesser predators such as Velocidrome, Plesioth, Bulldrome, Royal Ludroth, Gobul, and Seltas. Thallonius's competition consists of other apex predators such as Rathalos, Tigrex, Nargacuga, Lagiacrus, Brachydios, and Glavenus.

Biological Adaptations
Thallonius is known to be highly venomous. It is able to exhale a poisonous aerosol that it uses to deter predators and conceal itself from prey while simultaneously trapping it, allowing it to ambush its victim. It also possesses acidic saliva that helps break down food when eating as Thallonius has a relatively weak bite force. It also possesses a poison sac located at the end of its tail. This poison sac secretes its contents through various small pores, allowing it to release said contents by muscular contractions or physical trauma. Several spines line the entirety of its backside. These spines serve to ward off airborne predators and other creatures that might try to climb onto its back.

Behavior
Thallonius is an aggressive yet skittish creature. It'll attack prey on sight, but would rather flee from any predator it might come across. Should it not be able to flee for whatever the reason may be, it'll stand its ground and viciously attack whatever provoked it.