What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
A venomous marine snake with a flattened tail, which lives in the warm coastal waters of the Indian and Pacific oceans and does not come on to land.
Subfamily Hydrophiinae, family Elapidae: several genera and species, including the yellow-bellied sea snake (Pelamis platurus), the only species found in the open ocean