Random Riddle

I am a shadow.
Hold your mouse over for the answer.
I’m as small as an ant, as big as a whale. I’ll approach like a breeze but can come like a gale. By some I get hit but all have shown fear. I’ll dance to the music though I can’t hear. Of names I have many, of names I have one. I’m as slow as a snail but from me you can’t run.

What am I?