Water monitor : A very large lizard (Varanaus salvator) native of India. It frequents the borders of streams and swims actively. It becomes five or six feet long. Called also two-banded monitor, and kabaragoya. The name is also applied to other aquatic monitors.

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Taxonomy
water monitor, Varanus salvator, species, Type locality, monitor lizards, Varanus, Water monitors, Philippines, subspecies, free encyclopedia, Andaman Islands, monitor, tail, population, Fauna, Kingdom, Phylum, states of Malaysia.

Defination from the web:
water monitor lizards on the wild. ... Asian Water Monitor, Varanus salvator salvator the nominotypic subspecies is now restricted to Sri Lanka. ...