AS I've learned, this is ONE of the three openings this great cartoon has. Here's an earlier post with the same voice over (RIP Mike Roads) but different music. There's also an opening that has this music but no talking. I think this is the original music. I'm not sure if the 80s Herculoids cartoon has an intro at all, though they could have just recycled this one. It's been years since I've watched those.
I've just recently received the Warner Archive DVD set of the Herculoids and this set looks great. Almost too good for the animation, but that's no never mind. I'd forgotten how fun these cartoons are, though I still hope it never gets remade into something "realistic".