On his daily tour, Capt. Joe Dutra of Hornblower Cruises in California encountered what he called a "super mega-pod" of thousands of swimming dolphins that he estimated to be five miles wide and seven miles long. Dolphins' social groups usually number no more than 200 individuals, but abundant resources could bring multiple pods together, said scientist Sarah Wilkin. "They were coming from all directions -- you could see them from as far as the eye can see," Dutra said. "I've seen a lot of stuff out here ... but this is the biggest I've ever seen, ever."
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