There are many ways to create portraits of frog fish.
All about the face.

A male hanging out in the shadow a female.

It’s all about me.

Singing as if no fish are listening.

Who could forget the wide angle environmental portrait, showing the fish in its environment.

Fish portraits are fun to create but require an understanding of lighting.
If interested in learning about fish portraiture and lighting, consider a private underwater photography workshop. If your coming to Maui consider a one or two tank workshop with Douglas Hoffman