How do fish handle the cold..?

Question

Water-born mammals use fat in large amounts, but fish do not, why is that?

Why don't they go stiff and hypothermic?

Answer 1

Certain species of cod, flatfish and polar fish have a reduced metabolic rate and produce antifreeze molecules called glycoprotein to reduce the freezing point of their body fluids. One could look at it as the fishy version of bears hibernating, a survival tactic that has seen these finned friends outlive many other creatures on Earth.

Edit - While it may seem obvious that fish are able to feel pain, like every other animal, some people still think of fish as swimming vegetables. In fact, regarding the ability to feel pain, fish are equal to dogs, cats, and all other animals. Dr. Donald Broom, scientific advisor to the British government, explains, "The scientific literature is quite clear. Anatomically, physiologically and biologically, the pain system in fish is virtually the same as in birds and mammals."

Answer 2

Some fish are adapted to cold water: trout, salmon, pickerel, northern pike.  If they get too warm, they can die.  Other fish, like largemouth bass and catfish, are designed for warmer waters.  As the water cools, They

just

slow

down.  Their metabolism slows so much they might need to eat only one meal per month.

Answer 3

Threir body temperatures fluctuate..according to the temp of the water....when too hot they stay stationary, as much as possible- less eating.

When water is cold they move more and eat more

Both extreme temps they stay as close to the bottom as possible

Answer 4

because they are cold blooded meaning that their body adjusts to the temperatures around them. Fish can't "feel" anything.