60's B&W monster flick.
It starts as a Frankie and Annette flick, with a beach party, a 4-person rock band, guys and gals in swimwear and a motorcycle club. It even has some of the bad one-liner jokes from those movies.
Then some radioactive sludge is dumped into a body of water immediately causing old bones on the floor-bed to gain flesh and mutate in minutes creating our monster (may be one of the funnest looking monsters I have ever seen).
The monster is blood thirsty and its first victim is the hottest gal in the movie, Marilyn Clarke.
Somehow the monster goes from 1 to a whole hoard of creatures, all identical looking.
The best part is that the maid, Eulabelle Moore, figures out what can kill the creatures.
This movie had me cracking up and was a ton of fun to watch.