The giant fish on the Davy’s Locker sign always looks jolly, but his grin is tough to see after sunset, as are the waves, minnows and stylized letters that once blazed in glorious neon. “It’s so sad.

Another piece of Vegas history now sleeps with the fishes. The Davy’s Locker sign—the red-and-green neon fish that welcomed thirsty bar patrons at the corner of Maryland Parkway and Desert Inn for ...