Shark-attack victims seek revenge.

Shark-finning might be likened to catching a live deer, cutting off its
forelegs and letting it go. If not bleeding to death, or eaten by
predator, it will slowly starve after eating whatever browse it can
reach from where it lies.

Part of a gonzo film, mixing truth with falsehood.

The sharks in the film that had urchin-mouth also had their fins upon
release, suggesting these fishermen received other compensation to
create a sensational "revenge" story-line.

http://en.wikipedia.org/wiki/Shark_finning