A short clip of Corydoras habitat.

[Byron]

I don't see a lot of "Filter Feeding" going on in the videos taken in the wild. I must say the aquarium fish seem to be good at " Filter feeding" maybe it is something they do to take away the boredom of being in an aquarium.

It is not easy to get close-up videos of fish in the habitat because they tend to scurry away from the "threat" of the "predator" cameraman. But all those that do manage to show the feeding, make it abundantly clear this is how the fish feed. It is why they have barbels, to dig into the substrate and find the insects/insect larvae they principally feed upon.

 

[Bruce Leyland-Jones]

...But they DO NOT possess filters and are NOT 'filter feeders'.

 

[Byron]

As said before I hardly ever see filterfeeding activity in my Corys. But all vids show pretty small grained sand as said to be the "favourite" substrate.

You may be overfeeding them, or more likely not feeding their natural foods, which are insects and insect larvae in the substrate. Mine filter feed all the time, though I admit I really never paid attention to this previously, it was a given for the fish.

...But they DO NOT possess filters and are NOT 'filter feeders'.

They filter the food bits out of the sand they take up and then expel, so they are filter feeding.

 

[Bruce Leyland-Jones]

They filter the food bits out of the sand they take up and then expel, so they are filter feeding.

That's not how the label works...filter feeders actually have a physical filter that they use to filter the food. Most fish are able to expel waste food and excess bits from their mouths and out through their gills. That doesn't make them filter feeders.
When you eat olives or cherries and spit the stones out, would that make you a filter feeder?

 

[Byron]

That's not how the label works...filter feeders actually have a physical filter that they use to filter the food. Most fish are able to expel waste food and excess bits from their mouths and out through their gills. That doesn't make them filter feeders.
When you eat olives or cherries and spit the stones out, would that make you a filter feeder?

Honestly, this (=your response) is too foolish for words.

 

[Bruce Leyland-Jones]

Honestly, this is too foolish for words.

Agreed...perhaps I should wax lyrical about the world of music.

 

[DoubleDutch]

You may be overfeeding them, or more likely not feeding their natural foods, which are insects and insect larvae in the substrate. Mine filter feed all the time, though I admit I really never paid attention to this previously, it was a given for the fish.



They filter the food bits out of the sand they take up and then expel, so they are filter feeding.

That's probably it. I might overfeed and don't hide insects in the substrate hahaha.

But I crumble pellets so they should filterfeed to find those. Will closely watch them @Byron .

 

[DoubleDutch]

Honestly, this (=your response) is too foolish for words.

But I get what Bruce means to say.
Bambooshrimp is an example of filterfeeders he is reffering to I think.

Bruce is a Cherryfilterer hahahaha

 

[Bruce Leyland-Jones]

But I get what Bruce means to say.
Bambooshrimp is an example of filterfeeders he is reffering to I think.

Bruce is a Cherryfilterer hahahaha

But I'm not and that's my point...and neither is Byron and neither are Corydoras.
For ease, I'll simply quote that bastion of all accurate knowledge, (simply because it backs up my own seven years of study and subsequent qualifications), Wikipedia;

"Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. ... Some birds, such as flamingos and certain species of duck, are also filter feeders."

Examples can include krill, baleen whales, basking sharks, flamingo and sponges.

 

[WhistlingBadger]

What's this? A disagreement about the meaning of the term "filter feeding" as it applies to cories?

You're arguing semantics, guys, and it doesn't matter as it has no implications whatsoever to the well-being of the fish. I believe we can all agree that cories (and many other bottom feeders) do, in fact, suck sand into their mouths, remove the good bits, and shoot the sand out their gill slits, and that it is an interesting habit that adds greatly to the appeal of the critters in question. My Pangio cuneovirgata (a mini kuhli loach) do it all the time, and I find it highly entertaining to watch. I sort of wish I could do it: Suck in a plate full of salad, extract the bacon bits and bleu cheese chunks, and expel all the rabbit food through the side of my neck. It would make meal times so much more eventful.

 

[Fishfinder1973]

But I'm not and that's my point...and neither is Byron and neither are Corydoras.
For ease, I'll simply quote that bastion of all accurate knowledge, (simply because it backs up my own seven years of study and subsequent qualifications), Wikipedia;

"Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. ... Some birds, such as flamingos and certain species of duck, are also filter feeders."

Examples can include krill, baleen whales, basking sharks, flamingo and sponges.

We all know what filter feeders are by the way,mussels are an example.I also would class corydoras as filter feeders,as they filter food from the substrate.Oh wait,substrate isn’t water.
Why are you so damn picky mate???

 

[Bruce Leyland-Jones]

We all know what filter feeders are by the way,mussels are an example.I also would class corydoras as filter feeders,as they filter food from the substrate.Oh wait,substrate isn’t water.
Why are you so damn picky mate???

Why are some people so perversely resistant to basic facts?
Basic as in a filter feeder actually has a specific structure, designed to filter food.
Many fish actually do have such a grill-like structure and Corydoras do not.
It has naff all to do with semantics...
If I was to prattle on about saltwater fish, in the Tropical freshwater part of the Forum, my post would quite properly be moved to the Saltwater section. Is that semantics? No, but the post would still be moved.
The collection of bones holding our brains in is called a skull. If someone insisted on calling it a cabbage, they'd be wrong and that's got nothing to do with semantics.

Meanwhile, fish are being abused...

 

[itiwhetu]

The problem here, is there is a member who says everything must be scientifically accurate and have scientific papers to back up whatever is said, then uses a term incorrectly but can't admit he is wrong.
For me, I will still run and breed my Cory's on gravel, and I will continue to say that nitrates and incorrect water parameters are the reasons for barbel destruction on Cory's, not the substrate they are on.

 

[Bruce Leyland-Jones]

Honestly, this (=your response) is too foolish for words.

And I believe most strongly that your insistence that corydoras are true filter feeders is too foolish for words.
That said, if you shout out that pigs can fly long and hard enough, perhaps they will.
Beethoven was a charlatan and Sid Viscous was a paragon of virtue and a genius by comparison.
Mozart was of Chinese descent and Genghis Khan invented modern jazz.

I believe I'm done here.

 

[WhistlingBadger]