Assuming the tuna is fresh to begin with, probably a few hours to a day or so. Also, it will last longer sitting out if it is not in direct sunlight or by a window, stove, microwave, or heater, too.
From half a day to 1 day till it soaks, and 2-3 days till its off
Tuna fish will be good for a couple days left out of the fridge. After that, it will begin to smell stronger and go bad.
forever
There can be a lot of variables, such as the size of the fish, the temperature of the fridge, and how fresh it was when purchased, but as long as the eyes are clear, not cloudy, the gills are pink, and it doesn't stink, the fish is in good shape.
it will be musty & moldy
As good as gold for a day or two, and then they start talking back to you again and you have to shove them back in the fridge until they get good and scared.
It depends on how long they were left out.
24 hours
no, this must be thrown away. five years of fish in a fridge is too long for fish. this is not eatable anymore.
Only if you left it in the fridge too long.
as long as your willing to eat it.
yes.
Don't leave it more than 3 days in the fridge.
I will only keep fresh fish (any kind) in the fridge 2 days.