Shadows of the Sea

I've decided to abandon my Black Sun series- it's just not going in the direction a want it to. So this is a short story about an underwater paradise. Every little detail may not be correct because I don't have my ocean book with me! I know that Shadows on the Sea is a name of a book but I really don't care because this is just a short story on my blog.

Where there is water, there is life.
Snorkeling was so fun, Samantha never wanted to get out of the water. She smiled the best she could at her mom, who smiled back. The coral reef was absolutely teeming with life. Bright, colorful fish darted this way and that while they swam through the underwater paradise.
Sam could swear that the clownfish was giving her the evil eye when she almost ran into him. She used to have a clownfish as a pet. That is, until Dad had knocked its tank over and the stupid raccoon- what type of person keeps a raccoon as a pet?- had eaten him.
Something small and bright swam just a few feet away. Sam reached out to touch it, but suddenly it was gone. That was one fast swimmer. She twisted around, trying to find it, but it was hidden from sight.
Oh well. There were plenty of other things to look at. Such as the bright blue fish, looking a lot like Dori in Finding Nemo, that kept circling her mom, wondering what these huge, ugly creatures were and why they were invading its home.
While Sam's mom twirled around in the water, Sam looked around again for the bright thing. There it was! It was floating lazily near a fish. The fish snapped at it, but it swam away faster than Sam thought possible.
Leaving her mom, and ignoring what always happening in horror movies when one person goes off alone, Sam swam after it. After about fifteen minutes it disappeared, leaving Sam stranded in an underwater cave.
A shadow came toward her.
A shadow.
A shadow.
A submarine.
That was the last thing that Sam remembered.