this one is a bit old but was my first drawing of the concpet for the creature shown in the piece Attachment 1381051
Explanation: to live in an aquatic environment, human are encased in finned enveloped. It's something of a cross between an amniotic sac and a mermaid tail.
I'm writing a short fantasy story set in a world in which the sky is composed of an ocean. If you look at the first image I attached in this reply, you can see me start to work that out. This inverted ocean is populated by the creatures I have designed.
The plot centre around one such creature that has jumped out of the ocean and fallen to earth.
That's what i'm illstrating here ->Attachment 1381060