Your favorite Schooling Fish?

[Try-na]

My blood fins are completely see through with bright red tails & their fins are bright red with white tips so they are really quite flashy when they swim around. Also seem to be a little more hardy that the rummy nose. I have 4 & they like to swim with my 4 green fires. Nice to watch

 

[Borderlesscott]

Lemon, Penguin, Rummynose Tetra, Hatchetfish all school closely from what I've experienced. As for super tight formation, Glass Cats are amazing.
I've never had any luck with Galaxy Rasboras schooling, I have 20 scattered all round one of my tanks at present with 10 Green Neons which school much closer.

 

[Try-na]

Just found a new favorite. The Mosquito Rasbora (Boraras brigittae). Just got 8 of these guys for my shrimp tank. They're tiny & cheap. They were $1.99 & 2 for 1. This is a picture from the web as mine are still young so not as colorful at this pic but here pretty close

 

[KimeeBee]

My favorite schooling fish are:

1) Roseline Denisons
2) Rummynose Tetras
3) Congo Tetras

(In that order)