No, they are tropical fish but can live in cold water aquariums if you keep the water around 74 degrees. The Plecostomus will die in water below 60' but don't push them, They are meant for tropical aquariums.
They can if it is the right temperature and doesn't get too cold.
It isn't really recommended because it is a tropical fish but can live with koi if it doesn't get too cold.
A Plecostomus can live by itself.
No Plecostomus can not live outside in Michigan. It gets too cold. They prefer the water between 72'-82'Farhenheight(106'-116' Celsius). The only place in the United states that they could live outside year round is parts of Arizona, California, New Mexico and other hot south western states that never drop below about 65'.They can only live outside in certain places of those states not the whole state.
Koi are a cold water fish as are Sturgeon. Plecostomus are a tropical fish so they should not be kept together in the first place. Plecostomus are a large but peacefull algae eating fish and they are no real threat to any other fish.
MOSTLY live in cold water
I am guessing that you mean a Plecostomus. The answer is NO. Each of the species needs totally different conditions. Goldfish are cold water fish and suffer when the temperature goes over 75F. Plecostomus are tropical fish and suffer when the temperature goes below 75F. They will both survive for a while in one anothers parameters but eventually they will die from living in the wrong conditions.
clams live mostly in cold water.
plecostomus what do you feed it
Danios normally live in warmer water but are also excellent swimmers in cold water
No they will not survive the winter in most any place in the US if they are outside. They prefer the water to be from about 72-82 degrees Fahrenheit.
Clown fish are tropical marine species, they do not live in cold water.