This is the astonishing moment a spider was seen devouring a frog twice its size.

The huntsman paralysed its victim after catching it on a leaf in the Coorg district of Karnataka, India.

Shocked hiker Nachappa Aramanamada recorded the purple arachnid unloading its deadly venom into the yellow bush frog's neck.

The amphibian was seen struggling to free itself from the ferocious spider but it was already too weak to escape.

Nachappa said the spider carried its victim away to be eaten

He said: ''This is one of the unbelievable moments I have come across while photographing bush frogs. The huntsman spider did justice to its name by clinging onto a meal that was much bigger than its own body.''

After a few minutes of marvelling at the rare natural phenomenon on June 21, Nachappa left the spider alone to continue killing the frog. He then carried on with his hiking trip.

Huntsman spiders are known for their speed and aggressive mode of hunting. They are also called giant crab spiders because of their size and appearance.

The huntsman, which is sometimes mistaken for a tarantula, eats a variety of other insects, arthropods, small lizards and even frogs.