"Hair?"
Why would there be hair on the fishing line? The man had been fishing for decades, and this was the first time that he had come across something like this. At the time, his mind was blank. His eyes looked downward, wanting to work out if it was hair or just water grass.
The fishing light slowly sank. The light caught a shadow moving upward in the water. He did not get a close look, but he could roughly make out its shadow. It had no fins or tail, but it appeared to have limbs.
"A person?" When this thought filled up his mind, the boat was knocked into again, throwing the man into full panic mode. He took out his knife to cut the fishing line loose and started to paddle to the bank like crazy.
"Pull me back! Quick!" He paddled violently, but the boat did not budge. The black hair started to crawl onto the boat. "What are these things‽"