The slime-coat on a fish is called the mucoproteincoating which is like a longer way of saying mucus coating.
AnswerIt helps them swim easier.The slime coat of fish are the first and best defense against parasitic infections. Parasites such as ich and velvet have trouble attaching to the host fish through the slime coat.
Most fish have a slime coat around their body for easy swimming. If the slime coat comes off, the fish usually dies. Fish shoudl never be touched too much. A little comes off everytime it is touched.
Because when a Algae Eater becomes fully grown it likes to eat the slime coat off the other fish. ( NOT all Algae eaters though) for example the Chinese Algae Eater WILL eat the slime coat off the other fish when it is fully grown.
mucus? Doesn't ring a bell. Fish generally have what is called a "slime coat", which protects them in the same way our body oils protect us.
Although there are many debates about the effectiveness of aloe vera in a tank regarding a fish's slime coat, it's best to not add it at all.
Of course it's normal. Fish are not toys. They are living creatures who do not like to be picked up and if you insist on doing it you can expect the fish to die fairly soon from stress if not from other infections. Handling a fish damages its protective coating of slime. The next thing that happens after the slime coat is damaged is the fish gets a fungal infection and then it dies.
That red slime is a common problem in saltwater tanks. It is called 'cyanobacteria' but more people actually just call it red slime remover. Its a bacterial film. It can be removed with a product called Ultralife Red Slime Remover which is available at www.bigalsonline.com
I believe you mean the fishes mucoprotective slime coat. It is there to protect the fish from things (bugs/chemicals/etc etc) in the water that may damage it.
It doesn't matter in which order you put in the chemicals. One is primarily for removing chlorine and providing a slime coat, while the other is building up your "good" bacteria.
Handling any fish, regardless of where they are from, damages the epidermis and removes the slime coat, which can cause infections and other problems.
Scaled fish have a healthy slippery slime
its protection is the slime on its body