wow took me a couple of seconds to understand this image and I must say the image rivets the viewer's attention. Initially its trying to understand the frame and the subjects, and then its trying to discern the details of the identified subjects (viz the fish, the mother KF and the overall framing orientation). I love the color of the BG too, which adds a nice mood as you pointed out.
An image to explore and understand. Would love to see it in BIG