This is the incredible moment a boat full of anglers watched in horror as a monster shark rose from the deep to chomp the tail off another shark which they were trying to reel in.

The remarkable clip, which was filmed off the coast of Miami, Florida in April 2018, shows a female angler reeling in a bull shark when suddenly the much larger shark lurches into view and bites off the entire tail of the hooked fish.

Amazingly, the hooked shark continues to thrash about with no tail even as other sharks start to circle the bloody water.

The incident came as a huge shock to the fishing party who were attempting to catch tarpon, not sharks.

Fishing for tarpon and caught a shark by accident. Pulling him up to the boat for a picture and then to cut the line. Monster shark appears and bites the tail off the other shark.