Subtle Intimidation Among Tincs

[Tony]

I would separate the smaller one. I wouldn't expect any sort of breeding behavior at such a young age, but subtle bullying is definitely a possibility. Aggression does not always manifest in an all out brawl, there are also intimidating behaviors like statue-standing where the aggressor will pose in a perfectly still posture and basically stare down its opponent. There was a good thread on the topic posted on DB, I'll try to dig it up for you.

Links:

Agonistic behavior in dart frogs

Azureus posture question (contains a photo of the behavior)