Jed Gould, the influential Los Angeles disc jockey known as Jed the Fish, who used his off-kilter sensibility and deep musical knowledge to shine a light on artists like the Cure, Depeche Mode and the Offspring at the groundbreaking New Wave and alternative rock station KROQ-FM in the 1980s and ’90s, died on April 14 at his home in Pasadena, Calif. He was 69.

The cause was an aggressive form of small-cell lung cancer, Rudy Koerner, a close friend, said. Mr. Gould was never a cigarette smoker, he added, and before he was diagnosed last month, he had thought his recent violent coughing fits were related to the Los Angeles wildfires.

For decades, Mr. Gould served as a trusted musical savant — and drive-time friend — to young Angelenos, particularly members of Generation X. He also influenced future broadcasting stars.

In a social media post after Mr. Gould’s death, Jimmy Kimmel, who worked on the morning show at KROQ early in his career, described him as “a legend.” On his podcast, Mr. Kimmel’s old sidekick on “The Man Show,” Adam Carolla, a former host of the relationship show “Loveline” on KROQ, called Mr. Gould “an icon.”

With his boyish energy, free-ranging musical tastes and maniacal cackle, Mr. Gould helped lead a radio revolution at the maverick KROQ, based in Pasadena, starting in the late 1970s.

At a time when FM rock stations were dominated by hyper-produced corporate juggernauts like Styx and Foreigner, KROQ became a sensation for its “Roq of the ’80s” format, which shimmered with fresh sounds from New Wave bands like Talking Heads and Devo, synth-pop groups like the Human League and Spandau Ballet, and local heroes like X and the Go-Go’s.