Actually.....they're not all that difficult to breed and I'm sure it has been done many more times than just two. The difficult part is telling whether you have males or females. Ctenopoma acutirostre
, like others of the genus, have no obvious external gender differences. Males have a patch of very spiny scales right behind the eye and another (in most species) at the base of the caudal fin but you have to take the fish out of the water and examine it with a magnifying glass to see these patches.
I have three of these fish in with some other species of Ctenopoma
and they get along quite well for the most part. One of my Ctenopoma ocellatum
has taken a definite dislike to one of my Ctenopoma acutirostre
and will chase it whenever the two happen to bump into each other.
For those of you more interested in these fish, I wrote a profile on the Leopard Bush Fish here on Aquarium Advice. Here's a link: http://www.aquariumadvice.com/viewtopic.php?t=28445