Jake LaMotta, boxing’s “Raging Bull,” who brawled his way to the middleweight boxing championship in a life of unbridled fury — within the ring and outside it — that became the subject of an acclaimed film, died on Tuesday in Aventura, Fla., near Miami. He was 95.

His longtime fiancée, Denise Baker, said he died of pneumonia at Palm Garden of Aventura, a nursing Home and rehabilitation facility, where he had been under hospice care.

A “good-for-nothing bum kid” with a terrible temper, as he later described himself, LaMotta learned to box in an upstate New York reformatory, where he had been sent for attempted burglary. Having gone undefeated as an amateur after his release, he turned pro in 1941 and unleashed his enmity on dozens of ring opponents.

He ultimately became a pop culture symbol of rage when the director Martin Scorsese told his story in his 1980 film “Raging Bull,” based on LaMotta’s 1970 memoir of the same title, written with Joseph Carter and Peter Savage. Robert De Niro won an Academy Award for his portrayal of LaMotta, and the film was nominated in six categories, including best picture.