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 deep blue sea has these big blue sharks, but they seem to like squid a lot more than people when they get hungry. 

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 57mm x 19mm