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
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)
