The Mist
Critters
It might be 'The Stuff'.
I am not sure but I think you are looking for Monsters vs. Aliens. Bob was a blue jelly creature featured in that movie and voiced by Seth Rogan.
I believe the one you are talking about is "Spirited Away" by Hayao Miyazaki
Perseus killed the Gorgon Medusa and the sea monster that was about to devour the beautiful Andromeda.
Perseus kills one of them (Medusa). The other two persue Perseus but fail to find him as he is wearing the Helm of Darkness.
cose he killed a lot of monsters
Hellhounds, Medusa, and Hades (technically, he is not a monster, he is a god)
persus gets poisioned, zeus is perseus's father, perseus kills the kraken, perseus kills a giant scorpion.
Sam Worthington , as Perseus .
Sam Worthington is the actor who plays Perseus in the 2010 version. Harry Hamlin played the role of Perseus in the 1981 version.
Which movie? Likely, he does.
The main character to the famous story and the two movies "Clash of the Titans" is Perseus. Perseus is a demi-god, son of the god Zeus and the princess Danae. The problem with the second "Clash of the Titans" movie is that they make Perseus look too much like a tough guy than he really is. In the first "Clash of the Titan" movie they give a good idea of what Perseus looked like but the effect is what made the second movie better.
Most movie monsters are neither, but instead are Bob.
There are rumors, but no confirmations or weither on not The Sea of Monsters will be a movie.
Sam worthington