But Loki was hiding on the bottom of the river between two huge stones. The Æsir were unable to catch him on their first try, but they saw something moving deeper down in the river. So the Æsir went up to the waterfall again and threw the net out into the river again. This time they bound stones to the net, so it would sink to the bottom of the river.
While The Gods dragged the net through the river, Loki swam ahead of the net. When Loki saw that they were almost at the sea, he jumped up over the top of the net and swam back up to the waterfall. The Æsir saw this, and also returned back.
This time the Æsir split themselves into three groups, two of the groups walked at each side of the shore while Thor was walking in the middle of the river. They all pulled the net through the river all the way down towards the sea.
Loki now began to panic and realized that he now only had two options to escape, he could jump from the river into the sea which was very dangerous and it could cost him his life. Or he could once again try to jump over the net and swim back up to the waterfall.
Loki chose to jump over the net once again, but this time he would not be so lucky. Thor who was standing in the middle of the river caught Loki with one hand, but because Loki was so slippery he slipped back and forth between Thor’s hands until he finally managed to get a firm hold of the salmon near its tail. And that is the reason why salmons today are narrow towards its rear.