I discovered something about one of my corys

What's going on guys? I have 7 corys, soon to be 8 since I want to find one more to even the school out. Four are albinos and three are just lighter colored as will be the final one when I get that one. Now most likely the albinos and two of the lighter ones are variations of the bronze cory (corydoras aeneus) but due to spinier fins and a more noticeable greenish sheen I had a sneaking suspicion that one of the lighter ones was actually one of the brochis species and now I'd say that's pretty much confirmed since a few days ago I was shocked by how big he got in such a short time, he's suddenly almost twice the size of the others. My guess is that he's most likely an emerald cory (Brochis Splendens.) Knowing this, now I have a decision to make. Whether or not I should make sure that the 8th cory I get is another one like him. Do you guys think he'd be just fine schooling with different species and feel accepted by them? He doesn't seem nervous and is usually curious. He sometimes goes off on his own but all of them do that from time to time and he doesn't seem to mind being in the company of his smaller friends. He'll eat alongside them. Should he have another of his kind to avoid becoming stressed or lonely because again he doesn't seem to be now. If he'll do okay as he is I could easily get one more bronze cory but even though corys are very peaceful I wouldn't want the weakest of the three bronze ones to be singled out and picked on by whichever two are dominant if they for some reason don't recognize the albinos as the same species as themselves. What do you guys think I should get?

 

To be honest I've never seen corys pick on their tank mates. They are one of the most docile fish out there so I don't think the big guy will pick on the smaller ones. Just one more of the bigger ones would be considered a shoal so just adding another bronze or albino should be fine. I don't think it is going to matter. I have 2 albino and way too many bronze. I also have 2 false julii. Started with 5 but lost 3 shortly after getting them. The ones I have now are well over 5 years old and shoal with the albino and bronze. I don't think they would have lived this long if they were living a stressful life.

 

To be honest I've never seen corys pick on their tank mates. They are one of the most docile fish out there so I don't think the big guy will pick on the smaller ones. Just one more of the bigger ones would be considered a shoal so just adding another bronze or albino should be fine. I don't think it is going to matter. I have 2 albino and way too many bronze. I also have 2 false julii. Started with 5 but lost 3 shortly after getting them. The ones I have now are well over 5 years old and shoal with the albino and bronze. I don't think they would have lived this long if they were living a stressful life.

I definitely thought as much! Just wanted to make sure. Corys are just fantastic little fish! So accepting, docile and curious plus they help keep the tank clean and even have the courtesy to the clean algae off a snail's shell!

 

I definitely thought as much! Just wanted to make sure. Corys are just fantastic little fish! So accepting, docile and curious plus they help keep the tank clean and even have the courtesy to the clean algae off a snail's shell!

Yours are much more well mannered than mine! Mine just bother the Nerite Snails on occasion. But yeah they are just about the most peaceful fish on earth. I don't think they are even capable of being bullies, other than being so derpy that the larger ones will accidentally push around the smaller ones sometimes.

 

I definitely thought as much! Just wanted to make sure. Corys are just fantastic little fish! So accepting, docile and curious plus they help keep the tank clean and even have the courtesy to the clean algae off a snail's shell!

Oops. I meant 2 wouldn't be considered a shoal instead of would be. Seems I often forget to add the n't I agree. My little guys find every tidbit of food that makes its way to the bottom of the tank so I never have to worry about leftovers fouling the water. Of course they also get their own food too.

I actually add extra to make sure their share makes it to the bottom. I started with 3 albino, 3 bronze and 5 false julii's just over 5 years ago. As I said, I lost 3 julii's early on and also lost my big albino female a couple of years later. She was mom to most of the ones I have now. Although she was albino all her fry are bronze. I now have more than I can count. I am guessing at least 25 but there could be more. They never stay still long enough to get an accurate head count. Too many for a 55 gallon tank but I love each and every one of them.

 

What's going on guys? I have 7 corys, soon to be 8 since I want to find one more to even the school out. Four are albinos and three are just lighter colored as will be the final one when I get that one. Now most likely the albinos and two of the lighter ones are variations of the bronze cory (corydoras aeneus) but due to spinier fins and a more noticeable greenish sheen I had a sneaking suspicion that one of the lighter ones was actually one of the brochis species and now I'd say that's pretty much confirmed since a few days ago I was shocked by how big he got in such a short time, he's suddenly almost twice the size of the others. My guess is that he's most likely an emerald cory (Brochis Splendens.) Knowing this, now I have a decision to make. Whether or not I should make sure that the 8th cory I get is another one like him. Do you guys think he'd be just fine schooling with different species and feel accepted by them? He doesn't seem nervous and is usually curious. He sometimes goes off on his own but all of them do that from time to time and he doesn't seem to mind being in the company of his smaller friends. He'll eat alongside them. Should he have another of his kind to avoid becoming stressed or lonely because again he doesn't seem to be now. If he'll do okay as he is I could easily get one more bronze cory but even though corys are very peaceful I wouldn't want the weakest of the three bronze ones to be singled out and picked on by whichever two are dominant if they for some reason don't recognize the albinos as the same species as themselves. What do you guys think I should get?

Uou should post pics of the fish, so we can see what you're talking about and ID the possible "stranger"

Be aware there are several types of C.aeneus.

Edit : noticed I reacted on an old thread