The male swim along side the females with his fins spread fully and shimmering as he goes along side.
If the female is happy the bame will drop behind and below the female.
He will the approch the backend of the female swinning his gonopodium (breeding organ which is a modified anal fin) foward, he will them slace packes of spem at the geneteral opening of the female, She will be able to store the sperm for up to 6 months or so.
Helter