His fish has a black patch in the dorsal. It's simply pale from stress. I did say that the black spot (usually ringed with blue) on the operculum is an indication of female. And yes, "operculum" = "gill cover", in case you haven't realised. Males can have black in the dorsal. There was a thread here a few months back in which I ID'ed a particular Sal as female because of the black in the dorsal but it turned out to be a male, siring a brood of fry. Also, I've kept many Salvinis over the years. My last one, a 5" male, had black in the dorsal when he was 1" all the way till he was 2.5" or so, after which it faded.japes;1754489; said:It's a Male.
Females always have dark black spot(s) on the gill cover, as well as a black blotch/front section on the Dorsal fin. Males often have markings on the gill plate (which are less distinct than Females) but no black in their dorsal fin.
Edit: My reasoning is the lack of any black in the dorsal fin, time may prove otherwise when it's colours settle down.
There is a lot of conspecific aggression in Salvinis. Males will fight females over territory and vice versa.headbanger_jib;1755268; said:they keep fighting all the time
and the one whose pic i have put up is the smaller one and always is chased around by the bigger one, which is for sure a male
or do the male and female of salvinis also fight a lot
HerCrenVie;1757822; said:His fish has a black patch in the dorsal. It's simply pale from stress. I did say that the black spot (usually ringed with blue) on the operculum is an indication of female. And yes, "operculum" = "gill cover", in case you haven't realised. Males can have black in the dorsal. There was a thread here a few months back in which I ID'ed a particular Sal as female because of the black in the dorsal but it turned out to be a male, siring a brood of fry. Also, I've kept many Salvinis over the years. My last one, a 5" male, had black in the dorsal when he was 1" all the way till he was 2.5" or so, after which it faded.