A monster crocodile disguised under a thick, slimy green lake suddenly leaped out of the water towards an experienced animal handler.

Footage of the hungry reptile, named Bull, showed him jumping out of the algae-filled waters, after croc wrangler Matt Wright attempted to feed him a dead bat in Darwin.

Mr Wright immediately sprung to his feet to flee from the danger.

He managed to feed Bull the carcass, about an arms' length away from the crocodile's large mouth.

'Remember to only swim in the publicly open waterholes around the Territory and stay aware around all bodies of water, you can see how calm this water is and how quickly it all changes,' he wrote on Instagram.

The post, uploaded two days ago, has garnered nearly 240,000 views.

'Far out! I've watched this 6 times and I jump every time!' one user wrote.

'This is so scary. I would have tripped over myself trying to get away and I would have been his dinner,' another wrote.

Bull the crocodile was initially a wild reptile who Mr Wright said had to be domesticated under his care, after he tried to eat someone a few years ago.