The yellow-bellied sea snake belongs to the group of sea snakes called Elapidae, which is an ancient family of snakes. The first fossils were found in Texas
Sea snakes are typically dark green or brown with black markings on their backs that seem to look like bands. They are venomous but not as deadly as other
The yellow-bellied sea snake is as wide as it is long and typically has yellow or olive-colored skin and an unplatified yellow, brown or blackish-brown belly with white bands.
It also has white bars on the outer rim of each eye (megacephalic bar) and a black stripe that runs from the base of the tail to the center of the tail (adipose line).
The scales on its upper body are scattered with small white spots and four black bands. The lower half of the tail (the caudal region) is yellow
A large specimen of this species reaches up to seven feet in total length (including the tail) and one of the longest living snakes in the world.
The yellow-bellied sea snake is found in tropical and subtropical waters of the Indo-Pacific and southeastern Pacific oceans.
It is the largest and second-largest sea snake species (not counting the Persian or Coral snake, Hydrophis persicus) in the world
The average total length (including tail) is more than 4 m (13 ft) and the maximum total length (including tail) is more than 7 m (23 ft).