Eel is just providing the shock not the DNA. There is an advantage on the otherhand for species to be susceptible to this sort of horizontal gene transfer. E.g.

Eel is just providing the shock not the DNA. There is an advantage on the otherhand for species to be susceptible to this sort of horizontal gene transfer. E.g. bacteria populations will uptake environmental dna like this on the offchance they take up something beneficial (usually from other bacteria populations in the area that might have genes giving an advantage in that environment).