Marathon in Tail?

[Seaspray Mermaid]

I have this idea, I'm not sure if it's possible, but I'd like to do a version of a marathon swim in a tail. Maybe my current fabric, maybe my future hybrid.
If anyone has advice about getting this process started, or workouts to be prepared, or using a tail in such a long swim... or anything in general, please give it. I would love any advice.
Thank you!

[mermaid anastasia]

That sounds very interesting but i wouldn't know where to start so im interested to see what others say about it

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