Craspedocephalus puniceus is a venomous pit viper species endemic to Southeast Asia.

[6] Dorsally, C. puniceus is gray, brown, or red, with dark blotches or crossbars, which may merge to form an undulating stripe.

Ventrally, it is powdered with dark brown, and usually has lateral series of yellowish spots.

Research has shown that the higher the concentration of the venom, the greater the effect on the red blood cells.

[4] Found in southern Thailand, West and East Malaysia (Sabah and Sarawak), and Indonesia (Borneo, Sumatra, the Mentawai Islands of Siberut and North Pagai, Simalur, and Java).