[3] In a 2019 study it has been found it uses a complex system of blood vessels in its head called, the Modified Cephalic Vascular Network (MCVN) which is an adaptation that helps provide the brain with extra oxygen from water when submerged.

[4][5][6] Found in the Indian Ocean (From the Persian Gulf, Iran, Pakistan, India, Sri Lanka, Bangladesh, Myanmar, Thailand, Malaysia, Philippines: Visayan Sea, Panay) and the marine waters around Korea, Japan, Solomon Islands, South China Sea (including Hainan), East China Sea (including Taiwan), coastal regions of Shandong and Liaoning (China) coasts of Persian Gulf (Oman, United Arab Emirates), east through South Asia until New Guinea.

[9] Vipericidin, a protein of 187 amino acids synthesized by H. cyanocinctus, is the precursor of a cathelicidin, a type of antimicrobial peptide (AMP).

The high positive charge and the typical amphipathic alpha-helical conformation of Hc-CATH may be responsible for its potent antimicrobial activity.

Gene-encoded AMPs represent the main component of an innate immune system that protects snakes from microbial infections.

The innate immune system of sea snakes apparently enables them to resist both terrestrial and marine pathogens.