Beneath the Waves Keyframe Concept Art Part 2

Although the competition has ended, I wanted to follow the brief 'Beneath the Waves -
Keyframe Concept Art'
'In this Challenge you will create four (4) keyframes which show key narrative beats in your story that fit within the theme of a world beneath the waves. It’s not enough to create anatomically correct characters and believable environments. You will need to tell a compelling story that draws us into the time, the people and the drama of your underwater world.

Keyframes can be four (4) individual scenarios (unique scenes), or can be two (2) sets of sequential keyframes (before/after moments in the same environments) showing key story moments.'
I've broken the 4 keyframes down into individual projects on my Artstation for each Key frame.