There are several things one can do:-
1. Refuse to supply image use rights for fees that fail to reflect the cost and risk of creation.
2. Register your works with the US Copyright Office and hand over all infringements to an attorney.
3. Carry on creating and publishing images but use them as PR for another product, goods or service from which you can derive benefit/payment from.
Asking photographers and their egos to stand their ground with option 1 is not going to happen any time soon, but I subscribe to this policy. Option 2 derives an irregular but handsome income stream for me in spite of not publishing anything new for nearly two years. Option 3 helps sell all sorts of things; trips, books, courses - whatever.
There will be other ways and means. But its not stock, direct sales or Facebook likes of that I'm quietly confident.
Besides, the concept and practice of underwater 2D imagery is a bit old hat. Here's the latest from Scapa Flow:- https://skfb.ly/IGBF
And yes, some have been licensed. And work quoted for.