Difficult

What can be underwater, under fire, on fire and taking water all at the same time?

I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.

Thirty men and ladies two, gathered for a festive do; Dressed quite formal, black and white; soon movement turned to nasty fight.

Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.

Riddles and Answers