I recently bought 3 emerald cories for my 10g tank and when I fed them today the two big ones went to the food but when the small one came to the food they chased him away why is this? And how do I sex them because I don't want babies.
Emerald cories how do I sex them
- Thread starter Durbkat
- Start date
I think I may have to females and a male because the big ones look plump but the small one looks small and alittle less plump than the other to. So why would the females ignore and chase the male? Shouldn't it be the other way around?
The-Wolf
Ex-LFS manager/ keeper of over 30 danio species
firstly I'd like to say that emerald cories are not a corydora species
they are a brochis species, brochis splendens to be precise.
Mature females and larger and fuller than males and sexing
immature fish is often very inaccurate.
HTH
they are a brochis species, brochis splendens to be precise.
Mature females and larger and fuller than males and sexing
immature fish is often very inaccurate.
HTH
dwarfgourami
Fish Connoisseur
I wouldn't worry about them having babies. First they've got to spawn, which they probably won't do without being properly conditioned (don't know how easy-going brochis are in that respect). Then the eggs have got to hatch, before being eaten or contracting fungus. Then the fry have got to survive without being eaten. Then the fry have got to be fed. And the water to be kept extra-clean. These are not guppies, you know. Chances of spontaneous fry invasions are very slim.
Durbkat said:
dwarfgourami
Fish Connoisseur
Are you quite sure they are chasing him away from the food, not just playing?
I haven't kept brochis, my only experience is with corys, but they are always tumbling over each other and dashing after each other. Males are also meant to be smaller and skinnier.
Take your time and sit down and watch at feeding time. What is actually happening? Is he getting anything to eat? You could always try spreading the food out a bit in the tank, so he gets a chance while they are eating elsewhere.
I haven't kept brochis, my only experience is with corys, but they are always tumbling over each other and dashing after each other. Males are also meant to be smaller and skinnier.
Take your time and sit down and watch at feeding time. What is actually happening? Is he getting anything to eat? You could always try spreading the food out a bit in the tank, so he gets a chance while they are eating elsewhere.
dwarfgourami
Fish Connoisseur
Poor little thing. That's probably why he was chased then. Often otherwise peaceful fish will attack a sick individual, from protective instinct.
Durbkat said:
Hi Durbkat 
It's not like corys, and I don't think it's like brochis either to attack each other or any other fish. They just don't do it.
Perhaps the small one you have is a male, but it could also just be a sort of runt, or it could be from another batch and just be younger than the other two.
What makes you think it has gill flukes? I ask that because if it does, it's likely that your others do too and will need treatment. On the other hand, if you have seen him rubbing on the gravel, it's probably either high nitrites or nitrates in your water or a bacterial infection. He might have been weak to begin with and could not tolerate the normal bacteria in your tank. It's important that you try to determine the cause because medication for gill flukes is poison that you don't want to have to use if it isn't absolutely necessary.
It's not like corys, and I don't think it's like brochis either to attack each other or any other fish. They just don't do it.
Perhaps the small one you have is a male, but it could also just be a sort of runt, or it could be from another batch and just be younger than the other two.
What makes you think it has gill flukes? I ask that because if it does, it's likely that your others do too and will need treatment. On the other hand, if you have seen him rubbing on the gravel, it's probably either high nitrites or nitrates in your water or a bacterial infection. He might have been weak to begin with and could not tolerate the normal bacteria in your tank. It's important that you try to determine the cause because medication for gill flukes is poison that you don't want to have to use if it isn't absolutely necessary.
Hi Durbkat
If your fish was fine when you bought it, but his gills got sore after he was in your tank for a little while, the problem could be with your water and you will want to keep an eye on the other two.
If it was that way when you first brought it home, then it was sick at the store. Let me suggest that the next time you buy fish you look them over carefully before you pay for them. Some people don't realize that you have the right to look at the tank and actually select just which fish you want to buy. You should do that and not just let the salesperson net out the first ones he or she catches.
When I shop for fish I like to have the salesperson catch the ones I want and put them into one of those plastic containers that hang on the front of the tank. Once they are in there, but before they are put into a bag, I give them a good looking over and ask them to put any back that I don't like and get me different ones. Sometimes they think it's too much trouble, but I want to see what I am getting.
I suggest that you get into the habit of doing that too. It could very likely save you from bringing home a sick fish who will infect the others in your tank.
If your fish was fine when you bought it, but his gills got sore after he was in your tank for a little while, the problem could be with your water and you will want to keep an eye on the other two.
If it was that way when you first brought it home, then it was sick at the store. Let me suggest that the next time you buy fish you look them over carefully before you pay for them. Some people don't realize that you have the right to look at the tank and actually select just which fish you want to buy. You should do that and not just let the salesperson net out the first ones he or she catches.
When I shop for fish I like to have the salesperson catch the ones I want and put them into one of those plastic containers that hang on the front of the tank. Once they are in there, but before they are put into a bag, I give them a good looking over and ask them to put any back that I don't like and get me different ones. Sometimes they think it's too much trouble, but I want to see what I am getting.
I suggest that you get into the habit of doing that too. It could very likely save you from bringing home a sick fish who will infect the others in your tank.
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