Maybe the tides mate?Bit like metal detecting,a nice swell or even better a storm to take the top sand off.
You can do Meg Tooth finding tours in the states,some of them find a lot.
Fossil and Shark Tooth Hunting Tours - Charleston Outdoor Adventures
WWW.CHARLESTONOUTDOORADVENTURES.COM
Join expert naturalists on a shark tooth hunting and fossil tour adventure that takes you from boat...