Do sharks see in two dimensions?

No.

The Universe has three spatial dimensions (height, width & length). Therefore all living creatures with vision see in three dimensions.

It is possible that you are referring to the effects of monoscopic (as opposed to stereoscopic) vision. Having monoscopic vision affects depth perception (it worsens it; as you will notice if you close one of your eyes) but does not mean there is no depth perception at all.