Thanks for the replies.
Frosty, it does make sense. I agree, I had considered some type of plant life flowing in the current close to the bottom but couldn’t come up with anything that worked. I really like the idea of visualizing each element completely to an extreme point in movement.
“As I'm visualizing swimming fish I think the tail fin is a little more fluid even in a hard stroke(?) the tips could have a little lag or back bend(?)”
Even if I don’t use that extreme moment, it makes me think through all the motions involved. And you’re right, the tail should have had a bit more flex. I’ve used more of a big picture - stop a moment approach but I look forward trying this. Always good to get hear how others approach things.
Ausfire and Swedefiddle, Thank you for your kind comments.