Could be a bacterial infection called Popeye.
Probably due to poor water quality.
Filter a fish? Do you mean filtering a fish's tank? Well you have to filter any fish's tank.
That is just the color of your fishes scales,it does not really mean anything, why do some people have blue eyes and some people have brown eyes its just a distiction of that fish.
It means there is a bulging between the 6th and 7th vertebrae in the neck (cervical part of the spine).
It is black on it's back and on it's beak and is white on stomach and around eyes and stands 1 1/2 feet tall
It means he hates you. Bettas flare their gills out when they're trying to scare another betta away, or to impress a female with how large he is.
I am not sure what you mean by "spread your eyes." If you mean to move location the answer is no.
For your eyes
yes,all animals sleep,just because fish don't blink doesn't mean that they don't sleep.If you think they don't sleep because they don't close their eyes, well they don't close their eyes because they have no eyelids.Therefore they can't close their eyes even if they tried.
eyes
The fish is larger.
i am going to try to catch your fish
Taylor Lautner's eyes are eyes. But if you mean What colour are Taylor's eyes then they are brown.