What do whale sharks eat?

Bonito eggs clumped on human skin
The hundreds of [whale sharks that aggregate off of Isla Mujeres](/journal/tag/isla-mujeres-2010/) each year are here in a massive feeding frenzy. Their food are the eggs of bonito, which are released in huge quantities during spawning events in July and August. During our hours in the water each day with the sharks, our wetsuits act like egg collectors; by the end of the day, we have eggs all over our skin. Nathalie was nice enough to allow us to photograph eggs on her arm. She makes a great skin model.