“They just seem so quiet and nice,” says a jellyfish, one of the dolphins' neighbors. But reports continue to accumulate of cetaceans killing their fellow seafarers.
Why? What motivates them? It doesn't appear to be competition for food. Though it may just be for fun, a recent finding points to a new explanation. Mark Cotter and colleagues at Okeanis observed bottlenose dolphins chasing, ramming, and drowning lone harbor porpoises in the Pacific.
Since 21 of 23 dolphins were male, they must obviously have been murdering with that age old motive: sexual frustration.
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