Hydrophis viperinus
Range
Northern coasts of the Indian Ocean and western Pacific, from the Persian Gulf to Indonesia and southern China
Size
Males about 92.5cm; females about 82cm
The viperine sea snake is a venomous sea snake of the northern Indian Ocean and western Pacific, found from the Persian Gulf around India to Indonesia and southern China. It is more or less two-coloured, grey above and white below, with the two colours usually clearly separated along the sides, and often has 25 to 35 dark diamond-shaped spots on the back, rarely dark bands (Wikipedia, general species account).
Total length is about 925 mm in males and 820 mm in females, with a tail of about 100 mm and 80 mm respectively. The Reptile Database lists the Indian Ocean around India, Pakistan and Sri Lanka.