Sandbar can be a SeaWing. His cutie mark is three turtles, so yeah. He will be a SeaWing. What did you wait for me, a SandWing??

(Again, power of the Wiki)

SeaWings are typically stereotyped as cowardly and artistic.

SeaWings, also known as Sea Dragons or Ocean Dragons to scavengers, are an ocean-dwelling Pyrrhian dragon tribe with bioluminescent scales that cover their underbellies, snouts, backs, legs, necks, tails, gills, webbed talons, and sometimes wings. 

SeaWings commonly range from a scale color of blues, greens, aquamarine, cyan, teal, (rarely) yellow-green, indigo, blue-gray, blue-green, and blue-black, although Anemone is pale blue with pale pink webbing, like the inside of a seashell. She is said in The Lost Heir to resemble the pink dolphins that swim near the palace. In the sunlight, their scales look like glossy emeralds and sapphires, according to Clay in The Dragonet Prophecy. SeaWings usually have green or blue eyes, with some exceptions, like Fathom, having grey-green eyes. SeaWings have webbed talons with hooked claws, as well as long, thick, powerful tails, which makes them excellent swimmers and can even be used for self-defense. It is also said that they can make powerful waves with one splash of their tails. SeaWings have gills on the side of their necks that allow them to breathe underwater. SeaWings are considered small in height, and have long, compact bodies with short legs. They have curved horns, a slender and curved snout, and have two short tendrils coming from the bottom of their chin, which could help with blending into their environment or could just be a decoration. They have webbed spines along their chest and the backs of their necks to the tips of their tail. Like all dragons, they have five claws on their front talons and four on their back talons.

Well, i can see Sandbar as a SeaWing. Believe me, he will look nice.

Name: Scallop

Gender: Male

Tribe: SeaWings

Looking: A pale yellow dragonet with bluish-green underscales and bright green eyes.