A rather ugly fish on display and for sale. I believe this is a type of Monkfish - an Angler Fish to be precise - that huge mouth and rows of teeth looked a bit threatening through the viewfinder! At least it seemed dead.....unlike the crab which was still moving!
First I had to select out the white frame, as that would have given me 255 highlights. Then levels highlight picker was pointed at the foam on the waves. This both lightened the overall tones and changed the colour balance in favour of warmer reds/yellows (probably more like the colours of the original scene). Then a new selection just of the dark areas of the children's faces and clothes. Again a mid-tone lightening using Levels of that selected area allows us to see their features more clearly. What do you think?