$1:
Western culinary tastes do no consider the lamprey eel to be edible so there is no marketability for them. In some European countries like Portugal they are considered to be a delicacy and thus, there is a sustaining market for them. Smoked eel is also a delicacy in Poland. Lamprey are also eaten in the countries of Spain, France, South Korea, Sweden, Finland and the Baltic nations. In The U.K. they are usually used as bait for fishing (dead and cut up) and not for consumption.
https://biology.knoji.com/lamprey-eel-a ... ur-waters/
There is probably someone out there who can make it taste good. It undoubtedly has nutritional value and it is not harmful to eat.
I would probably try it. It doesn't look tasty but who knows? With proper spices, etc. If not, then animal feed.