When the hands are held like paws of a tiger we get Vyagraha Hasta.

Lets take a look at the Viniyoga Shloka (uses)
vyadhe bheke markatecha
suktau sanyujyate karaha
Shloka says that such a gesture is used to denote

A Tiger
A frog
An Ape
Nacre. Nacre is crystalline aragonite or calcium carbonate. Shellfish and mollusks excrete it when they are exposed [...]