The remains of a giant thresher - much larger than one you'd expect to find in Darkshore - lie beached on the coast of the Mist's Edge. How this creature came to be here is unknown; the group of murlocs that now feast off the carcass of it seem to be much too weak, even in large numbers, to have brought down the beast.
While some of it has been picked clean, enough of it remains to take a sample for Gwennyth Bly'Leggonde in Auberdine to study.
The bones you have are from gentle sea mammals that are known to inhabit the waters surrounding the base of Teldrassil. They had never been known to violently beach themselves like the threshers had been known to. Why would these creatures do this, I wonder? Well, perhaps the study of their remains will bear the fruits of knowledge that we seek.
Again, thank you for your aid. Please accept this honorarium from the Temple of the Moon.