The 1st, 2nd and 4th are males I'd say, based on their hairy bodies. The rear half of the 3rd fish is out of focus so it's hard to tell. A clearer photo of that one would help.
Groeten
Frank
I think you have 3 males and 1 female.
L134 males never get very "hairy" so body shape has been most useful to me.
I raised about 180 last year and have kept about 36 F1's as future breeding stock. I have 2 males and 3 females set up in a 20 long with 3 caves.
My impression is that they may be seasonal spawners. Mine started spawning late in February or early March then last spawned early last September.
I'm hoping mine resume spawning again soon.
I would say that you have at least three males and the thrid one is hard to tell as it is out of focus. The males are usually hairy and the females are smooth when well conditioned and ready to spawn. I have to breeding colonies whcih spawn every 31 days and usually I am getting double and triple spawns in the tank. I currently have about 300 of them as they are one of my favourite L numbers. When they are ready to spawn watch them they tell you when they wnat the water change and usualy you do so and wake up in the moring and you will have eggs. Mine have been spawning regualrly for about 2-3years now. They don't like it in the really warm summer months though it just gets to hot for them. lealea