If you have 'em, then post your threads about them here. If you are interested in them, there are some good African and Madagascar fish keepers here to give you good advice.
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I have got 2 rostratus and not sure of if there male or female. The biggest one is about 3 ½ inch and smaller one about 3 inch I had them in a 350 litre corner tank but have just moved them both into a 450 litre Juwel Rio. The new tank has a blue light and I have noticed blue on both the face of the rostratus could this mean they are both male or is it just the blue light? I dont think the females show any colour apart from there black spots.
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If talking Fossichromis rostratus...well,you've got a while to wait.
The males aren't sexually mature until a good size (well past the 3.5" currently) and subdominant males won't color up until that time either...usually two years down the road. They need a lot of room too as they are 10+" adults and won't spawn until almost 8".By then they can play Hell on stocking with anything else (and needs a 100+g)...and add in that they are active piscivores.
This isn't a "rock-dweller"...it's open-water predator that also sifts a lot of sand.Also known to hurt itself trying to dive into the substrate when frightened.
Got any pics handy ? That'd help a bit,but still no guarantees on sexing them.
Just think about it.
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