large cory died little to no reason?

[Sgooosh]

Hi! recently I found a skeleton of a cory catfish in the tank, it seemed to have already died for around a few days...
I did a water change.
parameters were perfect and no signs of anything else in the tank, only thing was that some xiphophorus were flashing for a while, maybe because of that dead fish.
that cory has been here for at least 2 years and I bought it as a very very large cory.

I am wondering what might have happened and how to prevent this in the future.

 

[Colin_T]

Without the skin and body there's no way to tell anything from just a skeleton.

It could have died from a disease, old age, poor water quality (unlikely considering other fish are ok), heart attack, stroke, virtually anything.

 

[GaryE]

There was a reason, but you'll never know what it was. Odds are it was still a young Cory, if you'd only had it 2 years. But things happen and we don't get much of a picture with just the skeletal remains. Even the day it happened, you probably wouldn't have known why unless its behaviour before it died gave clues.

 

[Sgooosh]

Without the skin and body there's no way to tell anything from just a skeleton.

It could have died from a disease, old age, poor water quality (unlikely considering other fish are ok), heart attack, stroke, virtually anything.

There was a reason, but you'll never know what it was. Odds are it was still a young Cory, if you'd only had it 2 years. But things happen and we don't get much of a picture with just the skeletal remains. Even the day it happened, you probably wouldn't have known why unless its behaviour before it died gave clues.

thanks, i guess I will just keep up the weekly schedule, and look out for symptoms.
it was a part of the group of biggest cories i've ever seen, around 3-4 inches.

 

[Colin_T]

could have been old age

 

[GaryE]

We often want to know. And we just don't. You always have to consider that when it comes to what we can observe about fish, and what we know about their lives and death, we're bone ignorant.

Their bodies are as complex as ours, and so are their illnesses, but they live like people in a pre-scientific world. Sometimes we see something we can handle, usually something like an external parasite. Most of the time, nope.

There will always be unexplained deaths, and weird developments in tanks. Aquariums are too alive to always be comfortable for those of us who like to control their worlds. They've taught me a lot about my abilities, but mostly about inabilities. You do what you can and things happen.

3 or 4 inches is big for a Cory. Which species?

 

[Sgooosh]

could have been old age

We often want to know. And we just don't. You always have to consider that when it comes to what we can observe about fish, and what we know about their lives and death, we're bone ignorant.

Their bodies are as complex as ours, and so are their illnesses, but they live like people in a pre-scientific world. Sometimes we see something we can handle, usually something like an external parasite. Most of the time, nope.

There will always be unexplained deaths, and weird developments in tanks. Aquariums are too alive to always be comfortable for those of us who like to control their worlds. They've taught me a lot about my abilities, but mostly about inabilities. You do what you can and things happen.

3 or 4 inches is big for a Cory. Which species?

i see, it was a paleatus cory. let me get a photo of the other ones

 

[Sgooosh]

this one looks a. little thin, not sure why

 

[AdoraBelle Dearheart]

View attachment 327297
this one looks a. little thin, not sure why

You said you got them as a group and they were already large, adult sized? Where did you get them from?

Are you able to get more photos of other members of the group?

 

[Sgooosh]

You said you got them as a group and they were already large, adult sized? Where did you get them from?

Are you able to get more photos of other members of the group?

yes they were from an lfs there were only 6 however and i got them all

 

[Colin_T]

View attachment 327297
this one looks a. little thin, not sure why

deworm them

 

[AlexT]

deworm them

Would you recommend this https://www.ntlabs.co.uk/browse-products/indoor/aquariums/anti-fluke-wormer/ active ingredient is flubendazole

 

[Sgooosh]

deworm them

ok but i suspect the reason is ive been feeding them less this past week so i will feed more with dewormer

 

[Colin_T]

ok but i suspect the reason is ive been feeding them less this past week so i will feed more with dewormer

Fish and animals don't lose weight simply from being fed a little less over the last week.