From the PDF:
The Jaws of Death is a micro-adventure that can be played out an an hour or less. It can be used as a filler for those times when a player is unavailable to game or running late and the party doesn’t want to continue the main storyline without him or her. It can also serve as a side adventure for your party to give them a break from the main story.
This micro-adventure is designed for an adventuring party of 6th to 10th level.
The Jaws of Death can be used at any time the party visits a coastal community. The NPC quest givers can be replaced with your own NPCs if you have an established community already prepared.
This supplement references information found in Shark!, and as such the shark presented in this micro-adventure differs from the normal shark found in the 3.5 System Reference Document.