What I love about practical creatures like this is how the actors can interact so believably with them. Gordon Scott as Hercules is able to be lifted up in the claws of the monster and tossed about. Sure, you can tell it's a giant puppet but at least it's actually there. Monsters like this add a lot of the charm of these films. I wish we knew who to credit for this one.
Mysteriously, the monster has tentacles in the opening teaser which seem to disappear later.