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A giant manta ray pauses to be cleaned May 26 at Keauhou Bay. Mantas have the highest brain to body mass ratio of any cartilaginous fish. (Barry Fackler/Community Contributor)
A giant manta ray pauses to be cleaned May 26 at Keauhou Bay. Mantas have the highest brain to body mass ratio of any cartilaginous fish. (Barry Fackler/Community Contributor)