Here.
Except it wasn't quite yet the "Pearly Shells" we all know in its English adaptation of the original, much older Hawaiian song Pupu A O `Ewa (Shells of `Ewa). Pearly Shells as we know it is by Webley Edwards and Leon Pober. The first recording of that appears to have been by the Hawaii Calls Orchestra and Chorus in 1966, associated with Edwards' radio show of the same name, Hawaii Calls, which was releasing recordings as early as 1956 on the Capitol Records label. I don't see any evidence of the song, however, on their early releases between 1956 and 1962. Perhaps Mockridge's music score for the popular 1963 film Donovan's Reef gave Edwards the idea to ride the wave. By 1980 the song was a "best of" for the orchestra. Of all the performances I've linked to here, I like the sound and energy of Mockridge's version the best.
