Namu, the Killer Whale 1966

Name: Namu, the Killer Whale
Released: 1966-08-01
Cast: Robert Lansing, John Anderson, Robin Mattson, Richard Erdman, Lee Meriwether

Synopsis:

Based on the amazing true story of a marine biologist (Robert Lansing) who befriends a six-ton Orcawhale, this "honest, fascinating and vigorously wholesome film" (Citizen-News) is heartwarming fun for the whole family. Like all close pals, Hank (Lansing) and Namu love spending time together. Whether sharing a morning swim or soaking up the afternoon sun, these two are virtually inseparable. Trouble is, the local fishermen mistakenly think that Namu is a threat. Racing against time, Hank must enlist the help of a young widow and her daughter to save Namu and prove that he's a gentle giant!