"Yes" admitted Samantha "but..."
"But what?" I asked.
"Well, the classic fishtail mermaid isn't my favorite kind of mermaid" explained Samantha.
"Then I wish Samantha would become her ideal mermaid."
Samantha smiled as she felt herself begin to change. She let herself sink into the water. Amanda pulled herself out of the water next to me to watch.
After a moment, Samantha's upper body rose out of the suddenly churning water. Instead of the bikini top, she now wore a dark black latex-like single-piece swimsuit. The tightness of the swimsuit revealed Samantha's breasts had grown from Bs to Ds.
From the water came black tentacles the same color as Samantha's new swimsuit. I quickly counted eight. As the water in the pool calmed back down, I could see the tentacles all joined where Samantha's waist would have been and there were no legs or tail underneath her. Instead the tentacles were long enough and strong enough to hold her out of the water to her waist then curl up again so the tips stuck out of the water. I realized the "swimsuit" was no such thing; the black latex-like material was part of her body.
"She looks like Ursula from 'The Little Mermaid' but with Ariel's looks" observed Amanda.
"So what do you two think?" asked Samantha. "I've long dreamed of being a cecaelia - an octopus mermaid!"