Great composition and great post processing. How did you get such great definition?
Great well framed shot with just the right settings to capture the action.
This will be a great trip. I spent a week in the Galápagos Islands about two years ago. Great photo opportunities. You will be able to get very close to the critters. A wide angle lens will be very useful. Also be sure to take a polerized filter. Have a good time.
I have this camera in my collection. Actually it's a great camera, particularly for your stated purpose. I recommend using it. There may be a time in the future when you might desire a camera with a few more feature. You will know when you arrive at that point.