There are several species of fish that are coloquially called "King fish" To the best of my knowledge they are all edible but some may not be good eating.
Yes it is edible
Kings ate roast duck,roast turkey,fish and fish eggs.
yes they are
yes they are edible with fish lice.because when boiled or roasted properly,all germs die
Yes, Arowana fish is edible. This species of fish is not a popular fish to be eaten, but it can be and will not harm you if you eat it because it is not toxic.
Yes. All fishes are edible.
yes
no no no
No. It is venomous. King snakes aren't venomous but I don't know if they are edible.
A fish uses its gills to sense what food to eat, if it's edible or in edible
no, this must be thrown away. five years of fish in a fridge is too long for fish. this is not eatable anymore.