Namu, The Killer Whale

From Wiki- Namu, the Killer Whale (re-issued as Namu, My Best Friend) is a 1966 American film about a "killer whale" (orca) being studied by a local marine biologist after the murder of his mate and initially feared by local townspeople.^[1] back to me:

I saw this in the theater at some kiddie show, I think more than once.  The second time had an unfortunate incident involving gum and my hair.  That is a sad memory for many reasons.