Zebra shark at the Similan Islands in Thailand



At Thailand’s Similan Islands, zebra sharks (Stegostoma tigrinum) are the ocean’s chill couch potatoes—if couches were sandy patches and the potatoes had fabulous polka dots.

By day, they park themselves on the bottom like they own the place; by night, they mosey around hunting snacks—crustaceans, mollusks, and the occasional distracted fish—like gourmet midnight grazers. Adults sport sleek, elongated bodies, broad pectoral fins, and a dramatic ribbon of a tail that looks like it was designed by a very extra fashion intern. Juveniles, meanwhile, show up in bold zebra stripes before growing into their “leopard” look, because marine branding is complicated.

The best time to meet these sedate supermodels is the dry season, roughly October to May, when the water’s clear, currents are polite, and your camera actually behaves. They’re famously mellow and will tolerate a calm, respectful audience—just keep your buoyancy tight so you don’t dust them like a clumsy underwater Roomba.

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