The Reef Stonefish primarily feeds on other smaller fish, shrimp and even cephalopods.  It is a carnivore and uses ambush type of techniques to capture its pray.  As it sits motionless on the bottom of the ocean and waits for a potential pry to swim by.  The Reef Stonefish then engulfs the pray with lightning speed.  It has been recorded that the Reef Stonefish take 0.015 seconds to catch its pray.

Reef Stonefish

Synanceia verrucosa