Thanks everyone. When I first made them, all the tails were as big/long as the first pic, but there were 3 in the middle that melted due to overheating and sunk down to only the fin part of the tail showing. I like those just as well, if not better than the full tail.
Those are adorable! I like the melted tails a lot too. They seem more realistic, because you can bet if you ever did see a mermaid, she'd disappear so fast you'd only capture the tip of the tail in pics.