beastsurf said..
They must have seen last nights news and the 2.8m one they let go.
Well, there is my invention.

Shark that is already 2.8 meters long will be 3.0 in "x" months/ days.
So lets develop Shark Time Bomb.
Each get caught now shark could be implanted with time bomb setup to activate in
- two months from now - for 2.8 meters shark
- two years for the younger
Anyway device will make sure that shark that reached prescribed length will be eliminated
Another option could be proximity sensor.
Buoys across the beaches and other protected from shark area could activate that internal bomb or at least send electric shock.
Lets get our famous professor next $300k to develop Shark Time Bomb / Electric Shock Implant.
I have already some suggestion for delivery system that could be both efficient and cheap to introduce.
Instead of the bait drums that need human crew to deal with each caught shark -
bait will be stacked with this electronic device and when swallowed - activated by stomach acid - to spring and penetrate to internal cavity from perforated intestine.
Additional optional GPS logger could record whole shark life to be later replay in scientific studies , when caught.