Actually, while most fish are cold blooded, they can still produce metabolic heat.
Thus, while that heat is quickly dropped via the gills, they're body temp will vary from the water temp a by 1 or 2 degrees.
So no lying through their teeth in that regard.
Thus, while that heat is quickly dropped via the gills, they're body temp will vary from the water temp a by 1 or 2 degrees.
So no lying through their teeth in that regard.