Photo by irablockphoto / An impressionistic look at tawny nurse sharks as they swim near the surface of the Timor Sea in Australia's Kimberley region. Nurse sharks are typically harmless to humans but can attack when harassed. They're mostly nocturnal but can sometimes be found during the day. Follow irablockphoto for more travel stories. #tawnynursesharks #australia #kimberly #irablock