Trunk Full of Rings - Anthro Shark

Once again I find myself with both hands buried in the trunk, sifting about before bring up another ring. The last ring had been great fun, trying to jump higher than last time even when you can't actually tell the difference between 60 foot and 65 foot. Eventually I'd removed the ring after my stomach had demanded food; jumping repeatedly for an hour is quite tiring work.

Looking at the ring in hand, I find myself intrigued by the pattern; it reminds me of the effect you get when light passes through churning water, the lighter blue lines surrounding the deeper blue. Placing it on book, I write "Is this by chance an aquatic type ring?"
"Why, yes. In fact, it's called 'aquatic'"
Knowing this, I write "could you open a portal to somewhere near water?" I didn't want to find myself suffocating if my lungs are replaced by gills.

Standing in front of the mirror, I slip the ring on and await my transformation. One momentary pause later, the first changes become visible. My skin begins taking on a tougher feel, as well as my front turning white while my back darkening to an orangey-bronze colour, except a few darker brown saddle-shaped patches running down my spine. Black spots dot themselves in the space surrounding the brown patches. My torso barrels outward slightly as a fin grows out from my mid-back. At the same time, I feel my spine extending out into a newly forming tail, fins growing out at set points along it. More fins grow on my elbow and knees as the tail reaches full length, stopping just above my feet. My neck thickens out as gills grow into the side of my neck, though luckily for me, my lungs remain, and are unaffected other than being coated in what I can only assume is some sort of waterproofing.

My entire face is drawn out into a long pointed snout, while my eyes relocate themselves to the side of my head. My ears grow out into points as my mouth fills with razor sharp teeth and my nose sinks into my snout. Strangely, for this transformation, my hair didn't recede into my head, which, to be honest, was a welcome change.

Looking myself over in the mirror, I try to figure out which species of shark I am. I know I'm a shark, mainly thanks to my mouth full of teeth.

"Hey book, any idea what species I am?"
"Of course. You're a Leopard shark"

A leopard shark, haven't heard of that one… I turn my attention to the portal door, a grin forming on my lips, exposing a large number of teeth. Opening the door, I see a paradise; blue sea, golden sands, and no one around to scream and point at me. Grin still plastered to my face, I take a running dive into the water, taking in my first breath through gills.