i had a cow fish(around 7cm) and two box fishes(very small) over the years and after a few days they literally disappeared in my 680lt reef lol no ill effects when they vanished though!
I guess they either died and decomposed under a rock really quick or i have something in my tank that has a taste for slow moving fish
Haha...maybe u do, nah I remember reading that they only release poison when they die if its stress indued death, not just if they peg off