Crocodiles riding ocean currents

See www.physorg.com/print194859447.html … not really SIS material but interesting as it may have evolutionary implications. How did they learn to do it, for example, aand are crocodiles really such brutes. Crocodiles in Australia cross large expanses of sea by riding the current. They will lay in wait until the right current comes along to get where they want to go. Literally, they surf, as crocodiles are not particularly good swimmers. In this way they are able to migrate and populate South Pacific islands. There have of course been many anecdotal accounts of crocodiles being seen by boats out at sea – but these have as usual been dismissed as impossible. This study proves otherwise.