I have read a few articles about various uses for fish oil, I have been toying with the idea of making my own fish oil and making it from various species of fish. testing each oil individually to see which would be the most benefit in my catfishing endeavors. I have read articles about trotliners in the early 1900's that would soak the mainline and trots of their trotline in fish oil or some other type of attractant to enhance their catches. At this time the most people that used trotlines were commercial fishers that were making a living out of catching fish. I just read an article from a man that was 88 years old and he was describing trotlining with his father and his (at that time aging) grandfather, he described his father soaking the mainline in various things such as: Oil of Rhodium, Anise Oil, and PURE Fish Oil. Also he described that they would soak the mainline in one "attractant" and the trots in something else. That got me to thinking which could be dangerous in itself, I can take a few different species of fish and process me some fish oil from each different species and see if there is something that would enhance my fishing endeavors. I am not interested in using it on a trotline so much but in the articles that I have read they have talked about the quality Flathead catfish that they would catch. I wonder if you set out limblines baited with for example Goldfish and you soaked the Line of the limbline in Bream oil that was gathered from bream if it would enhance the cat to take it where it might not have otherwise? Or if a certain type of oil say from Bass, Crappie, Carp, Etc. would cause a Flathead to show preferance no matter what type of live bait is on the hook? What are y'alls thought on this? I am interested in what everyone thinks and I'll be sure and document and post my process step by step.....I've got a killer idea on how to disperse the Oil/Scent that I'll discuss later.