This is my fakemon concept. My original crummy sketch is here for those curios:
http://www.furaffinity.net/view/5343734/

Pequedark-Velvet did an awesome job in drawing it where it looks somewhat decent.
http://pequedark-velvet.deviantart.com/

Sharkahn is a Water-Ground Type pokemon that can burrow through dirt as easily as it can swim through water. Usually only it's large black fin can be seen when it uses Dig and circles prey. It tries to come up under prey and swallow them whole.

It can extend its claws like a cat. Webbing is attached to the claws so when the claws fully extend it can swim much faster.

Sharkahn are extremely aggressive but fortunately are usually encountered alone. In rare occasions, Sharkahn can gather in large schools and can be extremely dangerous.