Hydrophis stricticollis

The collared sea snake is a venomous sea snake of the Indian Ocean, ranging from Sri Lanka and India to Myanmar and Bangladesh. Males and females both reach about 105 cm, with tails of about 140 mm in males and 90 mm in females. It has six small scales around the vent, and the scales are smooth in young specimens (Wikipedia, general species account).

There is little information on its reproduction, though it is known that reproductive cycles vary between local regions. The diet appears to include cutlassfish, judging from partly digested remains.