Back in the day, there were swarms of fireflies along the banks at the periphery of the Blue Bayou restaurant inside Pirates of the Caribbean. People came to Disneyland to see them;

The Ripple Effect

Dinner at Blue Bayou and Pirates of the Caribbean

Pirates Of The Caribbean

Eat Inside the Pirates Ride at Blue Bayou Disneyland

Floating past the Blue Bayou restaurant on the Pirates of the

Blue Bayou About To Shut Down At Disneyland As Part Of Larger

Down by the Bayou

Pirates Of The Caribbean

Fireflies, Pirates of the Caribbean Wiki

Dictonary