10 – 12 metres
Whale sharks are the largest species of shark and the largest fish alive today. They have a circum-global distribution, occurring in all warm and temperate seas other than the Mediterranean, and are a migratory species. At a number of coastal locations, predictable aggregations of whale sharks occur at certain times of year. These are often referred to as ‘whale shark seasons’ and are normally associated with a local burst in productivity such as a coral or fish spawning event.
Whale sharks are primarily planktivores but they will also eat small fish from time to time. They are regularly observed swimming close to the surface with their mouth open in a feeding behaviour known as ram-filtration which channels plankton-filled water into their mouth. Whale sharks do possess teeth, although they are not used as part of feeding. Teeth measure up to 3mm and individuals may possess in excess of 3,000 teeth at any one time.
Whale sharks in Galapagos
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Galapagos Whale Shark Project
"The whale shark is the world's largest fish, yet surprisingly little is known about it."
The Galapagos Whale Shark Project is using pioneering techniques to fill knowledge gaps and inform protections for this magnificent but Endangered species.