Me: Well, you see, when a shark, a human, and a pony love each other very much………..
…….The shark, the human, and the pony being organic must fuse with a half gem (namely Steven), then said gem leaves the fusion with the remaining party inexplicably unable to unfuse, thereby creating an entirely new species with a synchronized conscious. Or so they say.
It never directly says this and anthro shark ponies are a thing on this image board, let it go.
Edited
https://www.deviantart.com/ambris/art/Erika-Model-Sheet-773442684
There are actually other anthro shark ponies on this site, as odd of a combination as that may sound.
Also I can assure you that neither humans or sharks have pony ears. And the ych commission was an anthro pony until you added your own personal touch.
Edited