Mermares and Pirates

                                    

                                          
I think you can figure out the setting by the title
                          
As the moon shined over quiet seas, a dark figure swam beneath towards a ship, where a Captain stood gazing at the stars.
                          
He stared at the figure who stopped right beside his ship and smiled.
                          
"You're back.'' Sombra said. 
                          
He had been waiting for some time.

                          
Luna returned the smile.''Of course I'm back. Though it wasn't easy getting away from my sister this time.''
                          
She waved her cerulean tail above the water.'' Thank goodness I'm the better swimmer between us.''
                          
Sombra quirked an eyebrow.'' Is that so? How about between us?''
                          
''You with hooves and I a tail?'' Luna said with an amused grin.''You tell me, O' great Captain of the Crystalline.'' 
                          
''As somepony who has spent most of his life at sea, I can assure you I'm no beginner, Princess.'' Sombra replied with a wink.
                          
''Hah! Is that a challenge, Captain?'' Luna asked, eyes alight.
                          
''If only her Royal Highness wishes it to be.'' Sombra said.
                          
''Then to the rocks and back, the winner decides the prize!'' 
                          
''You're on!''
                          
Sombra dove into the waters and swam fiercely with all his strength.
                          
Luna, on the other hoof or fin, seemed to glide among the waves with ease, even managing to blow bubbles into Sombra with a wave of her tail.
                          
The two raced and at the end, Luna emerged victorious by a landslide to no one's surprise.
                          
Sombra was still making his way back when Luna awaited him by the ship.
                          
''If you meant no beginner by amateur, you've certainly proved it.'' Luna teased.
                          
He laughed as he reached her. ''You may do whatever you want for the prize.''
                          
Luna held a fin to her cheek, pretending to ponder. ''What ever shall I have?''
                          
Her eyes found Sombra's and a moment passed.
                          
She smiled.
                          
She leaned forward and kissed him.
                          
''A consolation prize.'' She whispered as she pulled away.
                          
She then splashed him with her tail.
                          
'' And that's my prize.'' Luna laughed.
                          
Sombra stared wide-eyed at her,  a mixture of amazement and affection.
                          
He guffawed and pulled her in for another.
                          
She cracked up.''No fair!'' 
                          
''Pirates aren't known for playing fair'' Sombra retorted, stealing another kiss.
                          
The Mermare sighed and rested her head against the Captain, smiling softly.''Fair enough.''