This slime layer serves several important functions, including:
* Protection from parasites and bacteria: The slime acts as a barrier against harmful organisms.
* Reduced friction: The slippery surface helps the fish move through water more easily.
* Camouflage: The slime can help to break up the fish's outline, making it harder for predators to see.
* Osmosis: The slime helps regulate water balance and electrolyte concentration.