Most likely your sights will be way off for the fish arrow. My fish arrow weighs about 1,465 grains. []

That's okay though, because most people shoot at fish without using sights. The best way to practice shooting at fish is to get out and shoot at stuff in the water. (floating debris, a tennis ball, carp)

I would just practice until you can point and shoot your bow without the sights. (it's not that hard, trust me)

Also, the shootingdistance for bowfishing is more likely to be measured in feet than yards. 10 feet, 15 feet... it's close range stuff.