When Veronica Plays the Harmonica, recorded by Kay Kyser (and others). First stanza:

When Veronica plays the harmonica
Down on the pier at Santa Monica
When she gives out with Gershwin or Bach
The perch and barracuda come wigglin' up to the dock
The seals and haddock get aquabatic
When she plays on her chromatic
When she plays boogie woogie lobster flippity flop
She even made a submarine blow its top
When Veronica plays her harmonica
Down on the pier at Santa Monica