You're gonna need a bigger boat. 

These tags are not going to stop moving! 

From our friends at Lansharkz comes this series of sea sharks!  The basking shark may look scary, but don't worry, unless you are plankton, you should be safe. 

The Shark Travel Tag series is trackable at Geocaching.com. 

This series is designed by Landsharkz.ca and is available for a limited time. 

Dimensions:  Approximately 50mm x 25mm