Just a really quick sketchy doodle, didn't bother with much detail or clean-up. Every time you see a hippokampos, it's always a dainty arabian-looking horse. Where's the love for the big horses? So here's a draft hippokampos. (Gotta love those fluffy feet!) I also added a pair of back-fins because well... a horse isn't very streamlined, it needs something to steer with besides its tail. =D