Pascal Kobeh / Whale shark (Rhincodon typus) gather around small fishing boats in the morning as local fishermen feed them shrimp, watched by tourists, Oslob, Sulu Sea, Philippines

Pascal Kobeh / Whale shark (Rhincodon typus) mouth wide open, feeding on plankton close to the surface with snorkelers nearby, Yucatan Peninsula, Mexico

Cheryl-Samantha Owen / Shark spotter walking along the shore at Kalk Bay beach, near Cape Town, Western Cape, South Africa. July 2013.

Cheryl-Samantha Owen / Shark spotter walking along the shore at Kalk Bay beach, near Cape Town, Western Cape, South Africa. July 2013.

Cheryl-Samantha Owen / Shark spotter holding his binoculars, False Bay and Muizenberg Beach, near Cape Town, South Africa.

Cheryl-Samantha Owen / Shark spotter by beach huts, Neveron, Muizenberg beach, Western Cape, near Cape Town, South Africa. July.

Cheryl-Samantha Owen / Shark spotter looking out to sea at Muizenberg Beach at sunset, near Cape Town, Western Cape, South Africa. July 2013.

Cheryl-Samantha Owen / Shark spotter looking out to sea on the side of mountain above Kalk Bay, False Bay, near Cape Town, Western Cape, South Africa. July 2013.

Cheryl-Samantha Owen / Shark spotter looking out to sea on the side of mountain above Kalk Bay, False Bay, near Cape Town, Western Cape, South Africa. July 2013.

Cheryl-Samantha Owen / Shark spotter talking on the radio to his colleages at Kalk Bay beach, near Cape Town, Western Cape, near Cape Town, South Africa. July 2013.

Michael Hutchinson / Car park for shark and whale watching with model southern right whale (Eubalaena australis), Kleinbaai, South Africa, December.

Pascal Kobeh / Whale shark (Rhincodon typus) mouth open feeding on plankton at the surface with tourists watching from boat, Yucatan peninsula, Mexico. Caribbean.