lot vintage photo slides, water show w/dolphins/porpoises&killer whales

Lot of about 20 assorted vintage 35 mm photo slides from the 1960s. Most of these slides are of a water park animal show featuring dolphins or porpoises (we're not sure which or maybe both?) and a black and white orca whale (also known as killer whales).

We're not sure what park the show was at (there is an advertisement for Royal Crown Cola in the back of one shot) and the slides are marked 1967.