Shark fins on the bottom of my boat float boat?

Question

for school we do a boat float(all the groups pick a them and build a boat, out of cardboard and ducttape) we are doing a battle boat(try to sink others with our paddles) what would be the best way to design our boat. would shark fins on the bottom help keep us more balanced. our theme is the gold rush, if you have any ideas, tips, or wed sites to give me will you please get those to me. PLEASE =)

Answer 1

fins on the bottom of the boat only work at speed. since you will not be going thru the water very fast fins will not give much support to the craft.

Answer 2

I wouldn't put the shark find on the bottum of the boat.  if it's uneven at all it will most likely tip it over

you would make a few on your own see which ones work best