Skystar was always willing to help her friends. Pinkie and Twilight came to visit them in Seaquestria, her mother using the Pearl to turn them into seaponies. Twilight had a book with her this time. Bound in magic to keep it from dissolving in the water. A Bestiary. Two point oh. Whatever that meant. She wasn’t entirely sure helping with this was going to be the right kind of helping though.

The three of them swam to a deeper part of the ocean. A castle barely visible from her own home. There was an… uneasy peace between the Hippogriffs and the Merponies. Hippogriffs didn’t invade, by which the Merponies meant attacking without warning. The Merponies, in turn, wouldn’t retaliate. The two of them could live in harmony, strained though it was. Skystar would relay Princess Twilight’s message.

Merponies didn’t speak Equish. Barely spoke at all. Hippogriffs and Merponies could communicate while the hippogriffs were in their seapony forms. A telepathic link or perhaps “fish speak”, bubbles and the like or movements. Twilight was going to take notes. As they neared the Merpony kingdom, the two earth bound visitors marveled. It was gorgeous. The spires were made of coral, towering higher than one would think. The castle looked as though it would rival the Crystal Empire in height and beauty.

Nearing the gate, Skystar and the two ponies stopped. The two Merpony guards that approached them didn’t look much different from Hippogriffs when they were under water save for one difference. Merponies were larger. From their heads to their tails, a single Merpony was easily twice the size of a Hippogriff turned seapony. Skystar informed the Merpony guards why the other two were with her.

Some fish speak bubble talk was exchanged before the guards gestured for Twilight and Pinkie to follow them. A look at Skystar was enough to tell them she wasn’t invited. She waved to her friends before turning and swimming away. Entering the castle proper, Twilight and Pinkie were given seashells. One of the Merpony guards showed them how to put them on. Doing as they were instructed, they felt little tentacles wrapping around their necks.

A slight pinch and the bubble talk of the Merpony guard turned into Equish. A translation mollusk. That’s what he called it. It would allow them to understand what was being said as long as they wore it. The “interloper” princess had informed them why the land dwellers were there. While it didn’t seem wholly necessary, several of their own ventured to land from time to time. While they could live under the water, it was nice to breath the open air sometimes. Getting sick while above the waves was a death sentence.

Perhaps a medical journal could help with that problem. The King of the Merpony people was an intimidating being for certain. Unlike Queen Novo, King Andreas was enormous. Seated on a throne of coral his many tentacles wrapped around the base of it, holding him in place. The trident resting at his side seemed like one of the pillars of the castle. The easy smile that graced his face was the only thing that put Twilight at ease.

A quick explanation, as well as his own waterproofed copy of the bestiary, and he agreed. He would allow the Princess to get the information she needed. His daughter and son would assist her. Twilight was about to ask what he meant when she was suddenly grabbed from behind by a tentacle. She was turned rapidly in the water and had to wait for the bubbles to clear before she could see what was happening. Her face flushed as she watched as Pinkie was taken in by a male of the species.

She wasn’t eaten. Not by his mouth. No. His eight tentacles had moved back, revealing his front and the long shaft that was slowly engulfing her pink friend. From the way Pinkie squirmed, she’d initiated contact. Twilight had to sigh but then remembered the drones and cameras. Pinkie’s drone was circling the prince, recording everything. The camera lens on her eye was also recording. Even if she didn’t get any notes, she’d be able to transcribe everything.

Twilight was about to thank him for his eagerness to help until she felt something warm and sticky around her hind hooves. Trying to look down herself revealed that the Princess had wound her entire body in tentacles and was lounging on her back, languidly feeding Twilight into her sex. No. Not a sex. There was a beak there. Twilight could feel it ever so gently gripping her legs. The Merpony Princess had two mouths. Taking rapid notes, while being eaten, Twilight re-amended her assumption. She didn’t have two mouths. Merpony female vaginas were simply protected by bone hard beaks. She made a mental note to ask later if that was a genetic design to deter unwanted mating.

Looking towards the Prince, she noticed that all that was left of Pinkie was a bulge traveling down the length of his shaft. And that he was swimming closer. Opening her mouth to ask what he was doing, Twilight was interrupted as he assisted the Princess with taking her in. His cock pressed against her forehead, her horn disappearing into the shaft, and he pushed.

In moments, Twilight was shoved into the Merpony Princess’ womb and jostled, repeatedly, as the two Merponies mated. She could feel him getting more and more vigorous, pushing harder with every thrust before he stopped. Twilight heard before she felt the torrent of semen join her in the womb. Following a short pause, Pinkie also joined her, followed by yet more Merpony semen.

Pinkie, for her part, laughed. It was all a game to her really. They didn’t actually have sex with the Merpony monarchs. Just… participated. Twilight sighed, taking as many notes as she could. She then started to feel something. A tingling around her hooves. Looking around, she noticed they weren’t in a womb. They were in a stomach. Lighting her horn, she quickly teleported them out. The drone did not go with them.

One week later, Twilight reviewed the notes and footage from their escapade with the Merponies. They weren’t as detailed as they could have been, but she got what she could from Pinkie. According to her pink friend, the male Merponies balls had been roomy. Slimy, sticky, and frequently tight, but roomy enough that she could relax comfortably. It was the opposite for the female’s stomach. Tight, hard to move around. Especially after being joined by Pinkie. Getting information from Queen Novo, Twilight amended a previous entry in the old Bestiary.

Merponies reproduced in a similar fashion to fish. The females would lay a massive clutch of eggs and every male in the vicinity would fertilize them. Twilight almost wanted to go back and witness that. She had a feeling, however, that she’d be witnessing it from inside a male.

Author's Note

And here we have another denizen of the deep. Meet... the Merpony. Half pony, half squid. It's a wonder how they reproduce, since the females "vagina" is also a second mouth. Might have to study that next time Twilight.