Purpose of Engineered Organic Flying Whales

This is question #1 regarding the background art of Worldbuilding.SE

One of the first things I noticed when I found this site was that amazing background picture. I like to think a great story can come out of any art, and this seems perfectly suited for it. This artwork has captivated my attention for a while now.

I've decided to split the questions for the world into multiple parts, and this is the first. The first thing I noticed and wanted to address was the flying whales above the city. They appear to be organic (not robotic), and I have no idea why they would be there.

The Question

What purpose might such a creature (a biological flying whale) serve in a futuristic city? The city I have in mind would be isolated, existing on another planet (possibly a desert planet that has many random features like the art), and full of people.

Edit: I have now seen the other post about flying whales and how they can work, but I'd still like to know what purpose they could serve (assuming they were engineered by humans).

I will post the links for the next questions as I write them, or feel free to write one yourself and post the link here:

Q1:Organic Flying Whales

Q2:Human Survival on the Surface of a Brown Dwarf Star

posted about 7 years ago

BlippThePanda‭

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