What you'll need:
1) Plastic bag.
2) Two wooden sticks.
4) (In order to attract the fish you'll need bread)
Then, ape a stick to one side of the bag like in the photo.
Now tie one piece of rope to the middle of each stick.
Do the the same to the other side of the bag so it looks like a purse.
Step 2: Testing the Trap
Put a small stone inside to keep the bag open.
The bag should be with its entrance pointing upstream.
Put a small piece of bread inside.
Hold the ropes Strained and wait for fish to come in.
Pull the ropes and move the fish to a box.