10 Summer Horror Movies You Have To See

This one is pretty much completely awful, but in a fun, B-movie way that's highly enjoyable. 

Released in 1964, the movie takes place at a beach party where half-human, half-fish monsters suddenly attack. But before that, there's tons of goofy beach dancing, dudes in leather jackets, and a whole bunch of surf music performed by the actual 1960s band The Del-Aires. That includes classic songs like "Zombie Stomp."

It was described at the time as "the first horror monster musical," but only if you define "musical" as characters awkwardly dancing around to bad beach music for an excruciating amount of time.

The monsters look downright horrible, cheap rubber suits with eyeballs popping out of their heads and what appear to be hot dogs dangling out of their mouths. Pretty much all the acting is cringeworthy, and there are long stretches that are totally aimless. 

But all of this just makes it even more fun in a silly way. It's got beach partying, terrible aquatic monsters, and everything you'd want out of a bad summer monster movie. It's best watched either with a group of friends prepared to make fun of it or within the Mystery Science Theater episode, though. Don't attempt to watch this alone.