That is good but also tells me know that one other is correct, for the fish spines did cause it heavy internal injuries and I have to believe that has caused swollen problem in which as well would give the eel problems in breathing.
It is difficult in trying to reach what is the eels problem for I even ask you if you like if I can call you while you where this eel is. Being now that it is a sure thing that this pinfish caused the eel much injuries, I suggest you get the maracyn-two as well for the epson salt do helps, but to where I am concern is this eel is in the worst of shape, Also do make sure it is the one for saltwater and not freshwater.
I am sorry that i type the name wrong at first
for if the eel lived i wanted that you get this as soon as possible and what would help me better is if I was down there where you folks live.
Now there aren`t anyfish in with this eel and do keep as high water quailty your friend can and also leave the lights off and raise the temp too 84 F. And one other thing, your friend has pumps inside this tank? Not make the currents too strong.