The brothers, longtime sport fishermen who live in Massachusetts, released a juvenile tiger shark in late July after catching it from a beach. “And I saw those horizontal lines, indicating it was a tiger shark, which was super cool,” said Nate, who is the social media manager for On The Water magazine. “Immediately I started yelling to my brother, ‘It’s a tiger, it's a tiger shark!' The adults are also more dangerous to humans than most shark species, though unprovoked fatal bites are rare. For the Rouette brothers, the encounter with a tiger shark provided a thrill they won't forget.