Yup Merponies, i had to draw my own after seeing one in one of eurobeat bronie’s videos. I wanted to have her do something with plants and stuff, so seaweed came to mind.  
Now for random info that i have made up on the spot.
 
Sea Weed the merpony.  
She lives in the ocean in a large Atlantis-like city, as a merpony she can’t wander around on land but can stick around to mingle with other ponies. She can survive in fresh water ponds, rivers, and other bodies of water. Her cutie mark is two strands of kelp and pearls, symbolizing her talent at healing others with herbs and minerals. Her personality would probably be same as the spa ponies. She is friends with Snorkle and her siblings