Watching this movie over 30 years after it was made, I can't help but think what a blast the extras must have had making it. The movie itself is a major hoot, and the shoots look like they would have been fun.
All those people drifting around in rubber tires and floatation rings. "Okay, now. Pretend that a school of razor-toothed fish are biting you on the...." Hahaha.
The kids in particular, now adults, can point themselves out to their own children. "Look. There I am. That's me getting chowed down by killer piranha."
I never get tired of this goofy, charming piece of nostalgia from the late 70s. What fun for fans of light-hearted horror flicks! What fun for the extras who got to work on it!