Black skirt tetra

[Darylb]

Hey guys and girls I have been hearing a bit of splashing at night in my tank and just looked and saw my black skirts chasing each other I don't quiet know how to sex them but one is really plumb and round and the other one is quiet skinny would this mean male and female? Also I saw them shimmy up against each other earlier on is this like a mating ritual?

 

[Bala shark]

Hey guys and girls I have been hearing a bit of splashing at night in my tank and just looked and saw my black skirts chasing each other I don't quiet know how to sex them but one is really plumb and round and the other one is quiet skinny would this mean male and female? Also I saw them shimmy up against each other earlier on is this like a mating ritual?

A femal is larger then the male it's very noticeable black widows commonly play and bond when they chase each other or when they is my up against one another, I my self have a school of seven in a 400L tank they are very difficult to breed but very strong against some diseases except what suspect valves disease

 

[Darylb]

Aww okay i was hoping they would breed I'd like to see what there fry looks like I might try and breed them soon