the salt starts to disintegrate
It dies.
It floats.
explodes
When the crayfish ages, it has a chance of chopping your goldfish to pieces, and possibly eat it.
Nothing. They're terrestrial.
The concentration of salt increase up to saturation.
The color of the flame depends on the metal from the salt.
The problem is not with the creatures, it is with your idea. Don't put crawfish and fish together. And feed your crawfish please. kill the craw dad.
fish and crawfish ,rum,salt,chemicals,fruit and vegetable
Salt cannot be "put in mercury" unless the salt is mechanically restrained. Mercury has a much higher density than salt and does not chemically react with it, so that salt will simply float on the mercury.
It fizzes up and overflows.