I don't think they are pink convicts, simply because you still have living fish with them. For their size, regardless of what they are, they might eat neons, glowlights, maybe zebra danios, even if they're not aggressive, the little fish just fit in their mouth, meaning they're potential food.
Particularly with more than one - unpaired convicts will likely kill each other, and paried convicts will likely kill everything around them (They're indiscriminate about mates, and will breed while they're still quite small).