They were very skittish initially - I actually purchased two pairs - one is in the 29 which still has a female hongsloi who has not been as friendly as i would like; the pair above is in a 5 (which i will upgrade to a 10 later this week). I was told they were wild caught - it took about 4 days for the pair above to tolerate my presence but now they no longer hide when i am in the room - while a 5 it has enormous hiding area - where i cannot see them. Hopefully the upgrade to the 10 won't be too disruptive. Behavior wise i'm finding them somewhat similar to borelli - perhaps a bit more shy since they were wild - but not aggressive. Also the description i have on sizes seem off a bit as the female is quite a bit small and distinctly different in looks from the male - as mature fishes you could never confuse the two.