Mermaid transformation

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All Loisa had wanted was a nice, relaxing day on the beach. When she heard the weather report, she knew that the perfect day to go for a swim was coming up – without hesitation, she packed the cutest bikini she owned and headed for the seashore.

The sand was warm beneath her toes, but not scolding hot – although later on the day, that was sure to change. The sun was out, with no clouds to block its heat from warming up the Earth’s surface.

Before long, Loisa found herself longing for a break from the sun, and opted to head into the water to cool off.

Normally, she’d wade around for a little before heading back to her towel, but today was different.

Something compelled her to go further in, beyond the safety line that was set up to keep swimmers from going too far.

A voice was calling her. The sea was calling her. It wanted her.

She swam past the line, proceeding further into the cool water. It was as if she was looking for something specific, without knowing what.

Suddenly, Loisa felt a tug on her foot. Did she get caught on something?

Impossible. She was well beyond the point where she could walk – and yet, something had wrapped itself around Loisa’s ankle.

She looked down, reaching underwater to see what it was – a branch of seaweed.

Just as she reached for the plant to untangle it from her ankle, it violently tugged at her, pulling her underwater with unexpected force.

A sentient plant? What was going on?

More seaweed appeared, wrapping around Loisa’s other ankle as it proceeded to drag her further down. The two branches joined together, tying her ankles to one another. There was no way she could swim away like this.

The branch wrapped itself around her feet and halted its descend – but Loisa had no plans of staying there.

She grabbed the seaweed, beginning to tug on the tough plant to release herself from its grasp – the air in her lungs was beginning to run out.

If she wasn’t quick, she would drown.

One final tug was enough to do the trick – the seaweed let go, but Loisa had taken too long to free herself.

Not being able to hold her breath anymore, she opened her mouth and inhaled desperately – whilst expecting to choke on water, she noticed that the water passed smoothly through her...

Well... not her lungs.

She patted her neck, only to find three small slits on each side of her neck.

Loisa had spontaneously grown gills.

Not only that, but the sentient seaweed had snuck up on her – and Loisa spotted it too late.

It wrapped around the panty of her bikini, ripping it off with a sharp tug.

“Hey!” Loisa let out an offended yelp. “Give that back!”

She tried to dive after the mischievous, thieving plant, only to find something wrong with her legs – they wouldn’t move.

What was next, was a sharp pain in her spine that moved along her legs – a rippling sensation went through her skin, as if it was moving along her body.

Loisa looked down;  her skin was indeed moving. The skin on her legs was slowly growing together, moulding into one, and shimmering blue scales were beginning to grow on the new skin.

Not only that – her legs were increasing in length as her thigh and calf bones turned to spine. Her feet were changing, growing bigger and thinner – her toes disappearing into the webbing that had grown between them – soon, her feet would be fins.

The same webbing had appeared between her fingers, too – and that wasn’t the only half of her torso that would change.

Her ears were growing and changing colour; little fins that  would help her hear underwater.

As her spine finished forming, Loisa was introduced to an entirely new sensation – her legs were closing up, meaning her vagina had to move.

Her vagina tilted, shifting to the front of her labia, where it would hide in a small slit under her scales until the next time she’d find herself aroused. Then, it would open, ready for her mate’s genitals to find their way inside.

Or... her own, webbed fingers if finding one took too long... the slit was already opened slightly, and Loisa could tell it wouldn't be long before it would open all the way, begging for attention.

The mermaids in the children’s movies Loisa had watched, all wore bras made of scales. Clearly this would not apply to her – her breasts had grown to a point where the thin, spaghetti-like elastic bands of her poor bikini top had snapped. It now floated around her, headed for the ocean floor. The seaweed could have it.

Mermaids didn’t have to adhere to human fashion standards, anyway.

Loisa flicked her new tail; learning to use it would take some time, but she’d get the hang of it anyway.

Now, she had to find a mate – she was curious to see how her reproductive system had changed. Would she lay eggs, like a fish, or become pregnant like a human?

Only one way to find out – and she was sure she’d find a willing participant on the sands of the beach she’d just left.