While admittedly a bit on the cheese side, I like the way that you approached this. Taking "fish out of water" both figuratively and literally was a fun way to tell the story.
Unfortunately there was a technical issue with audio syncing - it was a bit distracting at times.
The costuming was fun - I enjoyed the use of cupcake wrappers as fins. I think you approached your theme well - had you focused on the Fish's revenge, you would have slipped into Monster Movie instead :)