Whale Shark

Where it lives

Whale sharks inhabit warm pelagic waters across the world’s tropical oceans, typically between 30 N and 35 S. They follow plankton blooms, fish spawning aggregations, and seasonal upwellings, leading to predictable seasonal hotspots off Mexico’s Yucatan, Western Australia’s Ningaloo, and the Philippines.

How to recognise it

The world’s largest fish — confirmed individuals over 18 m. The body is robust and broad, dark blue-gray above with a unique pattern of pale spots and pale horizontal stripes that act like fingerprints for individual identification. The mouth is enormous, terminal, and wide — up to 1.5 m across.

Diet & behavior

Whale sharks are filter feeders that gulp huge mouthfuls of water and strain plankton, small fish, and fish eggs through specialized gill rakers. Behaviors include vertical “feeding” with the head out of the water as they suck in spawning baitfish. Reproduction is poorly known; one pregnant female carried 304 embryos.

Fisheries & Conservation

Listed as Endangered. Targeted fisheries in some Asian countries and incidental capture remain threats; whale-shark tourism is now a major conservation incentive.