THIS is the terrifying moment a shark almost ripped off a teenager's hand after snatching his fish and and dragging him through the water for 20 metres.

Jahmon Wilson, 18, had just caught a large kingfish in Nelson, New Zealand, when the "ballsy" bronze whaler shark encircled him.
Nearby spearfishers had warned Jahmon that sharks were approaching after his successful catch.

Before the teen had a chance to gather his gun and head home, the water turned white around him and the shark grabbed his fish, missing his hand by only a few inches.
Then, while still clutching his speargun, the shark dragged Jahmon through the water for 20 metres before severing his line.