Just wondering what this fish is?

Question

I found this video of Blue Acaras fighting...

http://www.youtube.com/watch?v=pru-P48SR8M

What are the fish in the background?

Answer 1

black skirt tetras

Answer 2

black phantom tetras

Answer 3

I've had those fish before. They are striped/zebra tetra. They can be found in most fish pet stores. They come in all sorts of colors (pink, blue, purple, striped) but are all the same shape.

Answer 4

they look like they are kissing  

Answer 5

long fin black tetras i have one in my tank

Answer 6

Do you mean the Blackskirt Tetras also known as Black Widow Tetra?