Good work on the set. I'm liking the red and flounder pics as well as the tarpon? breaking the water.
While there are dozens of elements that go into making a picture "good," the number one thing that you can do is make sure that the image tells a story. The eye needs to be drawn to the subject of the image on first glance and then that subject or what's around it must tell the viewer what the reason for taking the picture was all about. If you haven't already, google the rule of thirds. This is a great rule to follow (for the most part).