Measured during acclimatization, almost 3 inch... LOL... But it is a very docile despite its size, just hope it stays this way..
The butterfly is so cute and now with a bloated stomach, It eats everything that goes into the tank..
How much are you feeding it? Normal mysis is fine... And twice a week is enough... Observe it.. Increase feeding if you see it not opening or the base is receding..