The world’s oldest living male grey seal (Halichoerus grypus) is Magnus, who was born in 1963 and lived at Edinburgh Zoo, UK, until 1999 when he moved to The National Seal Sanctuary, Gweek, Cornwall, UK.

Magnus weighs approximately 210 kg (460 lb) and although the precise date of birth is not known, he is likely to have been born in October/November.