The spine-bellied sea snake (Hydrophis hardwickii), also commonly known as Hardwicke's sea snake[2] and Hardwicke's spine-bellied sea snake, is a species of venomous sea snake in the family Elapidae.

The species is native to the Indian Ocean and the western Pacific Ocean.

The specific name, hardwickii, is in honor of English naturalist Thomas Hardwicke.

[2] H. hardwickii has the following characteristics.

H. hardwickii is located in warm waters: