I think it could have maybe been explored a bit deeper and maybe making it a bit more succinct would create a bit more excitement.
e.g. "When suddenly, this beast appeared before me, ripping furious waves as it angrily approached me."
Suddenly, the beast appeared before me.....
"they had enjoyed every minute of my misery."
They enjoyed...
I quiet liked it, especially how you began without actually mentioning that it was about whales. It really drew me in, making me feel as if i were that person. Then, to suddenly find that it was about a whale really made me empathise with the Orca's plight.
The comments are just my opinion and probably reflect my writing style, so just go with what you think might relate to you.
Also i agree with Greenies comments, taking this in account would considerably boost your story.