A photographer snaps a whale shark feeding near Isla Mujeres, Mexico, in an undated picture taken during a separate whale shark aggregation.Whale sharks predictably congregate along Mexico's eastern coast each summer, but where they roam the rest of the year remains a puzzle, Maslanka noted.
"How populations are linked, if they're linked, what mixing takes place in terms of genes, whether there's any passage between the Atlantic and Pacific populations—it all still remains to be seen.
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