They usually all live in captivity.
a neon tetra is a fish. It has all sorts of neon colours on its body!
Green neon tetra was created in 1963.
Black neon tetra was created in 1961.
About 4 species.
The female may develop a swollen belly, caused by the developing eggs.
A neon tetra breaths the same way as any other fish with gills
A baby neon.
the scientific name for the Black neon tetra fish is Hyphessobrycon herbertaxelrodi
Neon Tetras are egg layers/scatterers and do not have babies. They can spawn every two weeks when conditions are right and they are also in breeding condition. They lay hundreds of adhesive eggs when they spawn.
it is slightly wider, and has a more curved blue stripe
No. If they are taken out of water or there is a change in the water parameters the ova will die. (I very much doubt if you would be able to see Neon Tetra ova with the naked eye.)
Question is not clear. Do you mean: "What types of tetra fish are there?" Neon, black neon, black, headlight-taillight, bleeding heart, carninal, glow-lite, to name a few, and there are many others.