The term 'Beyond the Sea Subject' refers to the singer Bobby Darin, who was born in 1936 and died in 1973. His stage name was Bobby Darin, and his given name was Walden Robert Cassotto. He was an American singer, songwriter, multi-instrumentalist, and actor who performed jazz, pop, rock and roll, folk, and country music. He is best known for his hit single 'Beyond the Sea, ' which was released in 1959.