can any one tell me how to tell the difference between a male and female blue dolphin?

[Justmick]

I have 2 blue dolphins in my 75 gal tank. When I stocked the tank I thought I was getting all males but I have noticed that one of my blue dolphins is "dancing" around my other dolphin occasionally. Does this mean I have a femal or is this something they all do? Any hep would be great. Thank you in advance.

 

[DJRansome]

Males dance with each other to show aggression. You may want to avoid having two of the same species in a male tank.

You could vent the fish to confirm. The openings on the underside of the fish will be the same size oo on a male whereas a female is more like oO from laying eggs.

 

[Justmick]

Males dance with each other to show aggression. You may want to avoid having two of the same species in a male tank.

You could vent the fish to confirm. The openings on the underside of the fish will be the same size oo on a male whereas a female is more like oO from laying eggs.

Tank you for the info. I had heard if venting but until now did not know what to look for. Thank you I will try

 

[punman]

I find them hard to sex by appearance (size, fins, etc). I once had four and thought I had 3F and 1 M and then one day saw the "male" laying eggs and picking them up with no other fish involved - so 4 females! I added a breeding group bought from a fellow fish geek and then all fish were breeding.

 

[Justmick]

I find them hard to sex by appearance (size, fins, etc). I once had four and thought I had 3F and 1 M and then one day saw the "male" laying eggs and picking them up with no other fish involved - so 4 females! I added a breeding group bought from a fellow fish geek and then all fish were breeding.

At what age/size did they start breeding for you?

 

[punman]

Male was 15 cm (close to 6 inches). Female considerably smaller. Not sure of age. They are one of the slowest growing cichlids in my opinion.