Fish choice for an iwagumi

[samc]

they are great mate. i am going to use them in my next setup for sure.

 

[George Farmer]

Hard to tell from the photo George, but they look similar to penguin tetras. Are they?

Similar colouration but these are Rasboras are larger, horizontally, and shoal real tight.

Penguin tetras are very nice; another underrated fish. Their swimming position makes an interesting and refreshing change to the cliche Iwagumi fish, but IMHO aesthetically suit a taller aspect ratio aquarium due to their diagonal swimming position. However, I have no doubt they'd still look very cool in your lovely aquarium.