Whale shark off the coast of Alifu Dhaalu Atoll, Maldives (© Bachir Moukarzel/Amazing Aerial Agency)

If you've never seen a nearly 40-foot, polka-dotted fish gliding past coral reefs, you are missing out. Today is International Whale Shark Day, a reminder that these slow-motion giants need our attention. First observed in 2008, the day is used by researchers and marine advocates to spotlight conservation efforts and threats like vessel strikes, plastic pollution, and unregulated tourism.