Ah yes, the great basilisk, one of the great sea terrors of Ara.

Basilisks are part of a special classification of creatures known as leviathans. In order to be classified as a leviathan, a creature must meet the following criteria:

  1. Immensely durable. Whether through a particularly thick carapace, the ability to rapidly regenerate wounds, or a combination of the two, a leviathan must be able to withstand immense damage, even from modern day weaponry such as conventional battleship cannon fire.
  2. Amphibious. Leviathans are known to be able to survive equally well in multiple environments. Land, sea, air, even underground in some cases.
  3. Gigantic size. Leviathans must at the very least meet a water displacement level of 50,000 metric tons, which is about the same displacement as most country’s heavy battleships.
  4. Destructive natural weapons. Leviathans possess hunting and defense mechanisms far beyond the norm of other creatures on Ara. While claws and venom are common among normal creatures, leviathans can possess various methods of attack ranging from fiery breath to explosive sonic booms.
  5. Unnaturally aggressive. This is considered the “make or break” factor of whether or not a creatures is to be classified as a leviathan. Leviathans display a level of aggression otherwise unseen in the animal kingdom. While many creatures will act aggressively and even extremely violently as a method of defense or territory protection, leviathans are notorious for savagely attacking animals and ships alike at the mere sight of them, and continuing a dogged attack long after any other animal would have backed down due to fatigue or injury.

Basilisks in particular are known for their ability to spray a highly corrosive cement-like substance from the vents along the side of their heads just behind their eyes. Once in contact, it rapidly solidifies on the surface and voraciously eats away at anything or anyone unlucky enough to be encased in the substance.

The gas this corrosion causes then builds with immense pressure until the now-cemented target explodes in a cloud of toxic corrosive gas and rock-like shrapnel.

Basilisks are also able to unhinge their jaws much like a snake and swallow prey many times larger than their initial appearance would suggest.

Males and females can be distinguished by the male’s head crest used both as a battering ram and for attracting mates. There is little to no size-based dimorphism between the sexes.

The basilisk’s fins are large and powerful enough to allow the creature to fly. It is also capable of slithering about on land, using its fins to push itself, but prefers to stay in the ocean most of the time.