Thanks to BellontheMove for the inspiration on this one.
You're a purple shark who swims around the depths of the ocean's salty waters.
You see green fish, yellow fish, stingrays, and blue whales. But in order to get this cache out of it's locked chamber, you'll have to guide yourself (the purple shark) using the directions below.
Each set of instructions will produce a number that will help you open the lock so you can free the cache container.
Good luck, purple shark!

Always start travelling from the top left corner!
Route #1 - Green Fish - Yellow Fish - Blue Whale - Stingray - Blue Whale - Green Fish - Yellow Fish
Route #2 - Green Fish - Stingray - Yellow Fish - Green Fish - Blue Whale - Yellow Fish - Green Fish
Route #3 - Green Fish - Stingray - Blue Whale - Yellow Fish - Blue Whale - Green Fish
If you're successful, you'll have a three digit code that will open the lock so you can sign the log sheet.