There are multitudes of neon fish, so this question is too vague to answer.
It sais gullible on your celing made you look
What does neon green look lie
Black.
like every fish through there gills
neon green =green neon blue=blue neon yellow=yellow ect.
like your mom (very funny...) A parrot fish looks alot like a rainbow, it has alot of neon types of colors on it and pretty big and fat. They have alot of blue and a light green on them. Freshwater parrot fish just has one color that's neon like again, Usually pink, blue, green, yellow, ect.
It could be a disease. Note where the lumps are and what they look like. Are there any sores? white spots? What does it's eyes look like? Are the fish acting peculiar? Observe the fish for a short while and notice what it looks like and what it is doing. You can go to where you bought your fish and they should be able to give you an idea or even tell you what might be wrong.
needle fish will certainly not work well with neon's, they will murder the neon's
if your talking about neon lights for example, a neon light is used to encourage people to come to a takeaway like fish and chips. So neon is a form of liquid inside a bit of plastic, like glow sticks. Who uses them is scientists to test them out
Neon Tetra is a tiny fish. They look like neon lights swimming around. Kissing Gourmet (that's pronounced Go-ra-may) If you get the Kissing fish you need to buy at least two so they can kiss each other. They are fun to watch. Look pretty, too. Angelfish are very pretty. They have long fins and seem to glide through the water. All of these fish will get along with each other in the same tank.
It is important to know what the warning lights look like on a car. The oil light on a 2003 dodge neon looks like a small oil can.
Many Fish don't eat guppies, like the neon fish. That is the most common mix I know.