I'm planting this in scraps since it's old... very much so. I'd really like to try this character again, so here she sits until I get my computer and scanner running. Not forgotten, just 'misplaced' Ha!
Briefly, this was my try at an anthro hippocampus. Not an anthro 'seahorse' in the direct sense. Sure, she's an anthro aquatic equine but not the seahorse-fish-species. A REAL sea-horse.
But it's probably as a zoologist I am bothered by this. However, I design my own fantasy creatures as well for a world me and a friend of mine are working on. But I mean, I never simply mix two animals together that aren't even close to resemble each other. You know a griffin, right? I got those, but I've designed them without having the butt of a lion. Instead, they have four eagle-legs and a long feather-tail. I mean, a huge eagle with a lion-butt is kinda silly when you think about it. But to be fair, that's not nearly as silly like a hippogriff; an eagle with a horse-butt. But the worst thing is a pegasus to me - yeah, a flying horse... fat chance.
But like I said, this is just me. And trust me; I have among the wildest imaginations you could think of when I create my characters and creatures. But when it comes to literally mix two already existing animals together with practicly nothing in common at all with each other, I just think it's... awkward. But you're still a very good artist, though.
In this instance I was going with the creature from Greek mythology, which is supposed to be the steed of Poseidon(God of Horses, Earthquakes and -most famously- the Sea). The hippocamp/hippocampus is depicted as the front of a horse, with a long coiling body of a fish or serpent. Some times with wings, sometimes without. Soooo yeah, it's a lot like a hippogriff/Pegasus type. Which I'm going to guess is your worse nightmare here. XD
Do mythical creature work in reality? Hell no. Could a Pegasus fly? Of course not, if you wanted to pick them all apart look at a dragon! Wings would NEVER lift one into the air. You might as well attack every mythical creature ever thought up, as most of them are wild hybrids. How could a centaur eat/breathe enough to sustain both halves? Or a mermaid?
As I said in the description, it was not intended to be an anthropomorphic Seahorse(the real fish).
And I apologize deeply for my comment... I did read it now again, and feel a bit ashamed of it. I do not think like that nowadays. I have more of a suspension of disbelief. This is a really nice picture, and I like it.