Wow! For the first time with a camera u/w you did a fine job! They all seem to be colourful, sharp and well-exposed. Nice work. I'd also point out that you did (in most cases) exactly what is most often recommended by folks that know fishes - get down on their eye level. I realize the lionfish image is a take that most can appreciate despite it not facing the beast. I really like the cornetfish image.
I'd say now you're faced with the challenges we all are... timing (right place, right time), patience (for the "peak of the action" as Martin Edge says) and trying to blend in while getting close enough to the subject looking back at you!