Lamp eyes

[Salts155R]

Just a curious question.
watching my fish swim around this morning and noticed that 1 of my lamp eyes if very different from the other.

All in the tank apart from one have very long fins with some really nice colouring around the edges then there is 1 with little fins and very plain as well as being a little bigger than the others that are very torpedo shape.
Don’t know if this is a gender thing or just an odd fish

pictures are hard to get as they love to be moving constantly

 

[Colin_T]

the smaller slimmer more colourful ones are the males.
the bigger fatter one with no colour is the female.

 

[Salts155R]

the smaller slimmer more colourful ones are the males.
the bigger fatter one with no colour is the female.

I thought that might have been the case but wanted to check.
what would be the correct ratio for them?
may them moment I have 4 males 1 female

 

[Colin_T]

even numbers of males and females, or more females than males.