Hi Andy, what a weird evolution the Dolphin creature has undergone! It is upside down even! But in essence, their function seem to remain the same, as a human tool.
Let me suggest some major revamp to your paintings. You could expand it to a wider landscape mode, give the landscape a major overhaul (more dangerous looking, lots of crevices, alien looking walls and mountains, and the like, all held together by a strong depth of field) and topped with extreme weather condition. You could add a herd of the dolphin mounts coming from the left side, one of them being ridden by the human or alien. The foremost alien could be the lead shepherd, watching over his herd.
The pointy thing on the backside of the dolphin looks like a stalagmite. What is its function?
Don’t give up, Andy. Keep trying!