Can you buy lenses for a nikon 810?

I just got my camera in August. I really wanna buy more lenses like the fish eye lens and others like that. But, I'm not exactly sure if you can change the lens with this camera.

Nope

You need a fully adjustable camera like a dLSR that uses interchangeable lenses.

You have a P&S camera and its lens is fixed to the camera and can't be interchanged with another

These are some of the thing you needed to figure out before spending your money on a camera, now you will have to wait until you can save your pennies for a $700 dSLR

The Nikon 810 is not a dslr that accepts interchangeable lenses. It already comes with an amazing 26x zoom lens, but does not have the required screw threads on the lens front to accept add-on "lenses".In a way, that's a blessing, as the vast majority of these so-called lenses are cheap image destroying pieces of junk, some of them damaging the lens itself.