On Saturday, local residents walking on Lepe beach in Hampshire discovered a dead shark which was later recovered without its head, tail and fin.
So what happened and why do scientists want the missing parts returned?
BBC correspondent Duncan Kennedy visited the scene to find out more.
Video by Serene Khalifeh.
Filmed by Tim Nicholson.
Read more here
This article was originally published by Bbc.co.uk. Read the original article here.