This fish, with its massive, globular body, is a poor swimmer. To move about, it uses its pectoral fins ending in a sort of webbed hand to hop around. It frequents lagoons and coral reefs up to 70 m in depth and often hides among the sponges. Each fish can change colour depending on the substrate on which it is resting. As a result, its colour is highly variable: white, grey, yellow, green, red or black.
The giant frogfish lies in wait to hunt fish up to its own size. With its perfect camouflage, it remains immobile and sucks in prey that passes within its reach. It is able to do this thanks to its protractile mouth, allowing it to thrust its jaws forward in just a few milliseconds.