Stunt?

[Jimmy74]

So giant danios get 6” in the wild and 4” in a tank. Should I not keep these in my six foot long tank? Would it be considered cruel?

 

[Wills]

Four foot minimum but really a six or five would be much better. There are a lot of danio species available like orange ring which are a lot smaller and look quite similar which would be better for a 40g. For a 20g look at celestial pearl danios.

Wills

 

[Jimmy74]

Four foot minimum but really a six or five would be much better. There are a lot of danio species available like orange ring which are a lot smaller and look quite similar which would be better for a 40g. For a 20g look at celestial pearl danios.

Wills

Mine are in a six foot
4” max. 4 yrs old
I was just referencing some tanks.
So what’s your opinion to my question?

 

[Essjay]

It's not just the size of the fish which needs to be considered. These are very active fish which need a larger tank to cope with their swimming behaviour.

 

[Jimmy74]

It's not just the size of the fish which needs to be considered. These are very active fish which need a larger tank to cope with their swimming behaviour.

that’s why they’re in a six foot long tank. So do u have an opinion if it’s cruel to be stunted at 4”?

 

[Essjay]

I don't think they are stunted in a 6 ft tank. There is often a difference in the size captive fish grow to compared to wild fish.

 

[Jimmy74]

I don't think they are stunted in a 6 ft tank. There is often a difference in the size captive fish grow to compared to wild fish.

If you were to take them from a hatchery and put them in the wild would they not reach 6”? They probably would. If this is so wouldn’t it be considered stunting their growth if they top off at 4” in a tank?

 

[Essjay]

Not in a 6 foot tank. Stunting occurs when a fish is kept in a tank which is too small for that species. There are other things which contribute to the size fish grow in tanks - the type of food fed to the fish vs its natural diet; chemicals added to a fish tank; even how well the tank is maintained.

 

[Jimmy74]

If you were to take them from a hatchery and put them in the wild would they not reach 6”? They probably would. If this is so wouldn’t it be considered stunting their growth if they top off at 4” in a tank? If you don’t know if captive bred that were introduced into the wild would reach their ‘wild’ length I understand but I’m guessing they would.

 

[Tez_20]

that’s why they’re in a six foot long tank. So do u have an opinion if it’s cruel to be stunted at 4”?

They won't be stunted in a 6ft tank with loads of room and most fish don't grow to the length they do in the wild anyway, so you tank in my opinion is a vast amount for the amount you have.

 

[Wills]

Mine are in a six foot
4” max. 4 yrs old
I was just referencing some tanks.
So what’s your opinion to my question?

I'm sure you're not trying to make me look silly after editing but just so we are all on the same page here is the original post...

So giant danios get 6” in the wild and 4” in a tank. Should I not keep these? Would it be considered cruel? Also if they get 4” in a 40 gal long and 3” in a 20” long is the 20 gal. acceptable or would that be even more cruel?

In reference to your new question, a 6 foot tank for them is great IMO and more than most sold in stores will get.

In terms of wild vs tank bred I'm not 100% on this species but given how active they are and how fast the current in the tank could be a big factor, if you kept them in a riverine specialist big tank with an extremely high turn over rate would they bulk up? Could age be a factor like Rainbow Fish, quickish to 4 inches but slow to anything over that. Is there something dietry they are missing in captivity that prevents the bigger size? Could there be descrepencies between specimens? Are the giants we have in the hobby from the same location as the bigger size you are referencing? Are we 100% the ones in the hobby are not a hybrid of some kind, they are a common fish now so I wouldnt be surprised? The reason I list these options are because it feels unlikely they are not attaining closer to a wild size just because of growth suppressant in the water column which is what you usually see with stunting (as long as you are doing good weekly water changes).

Wills

 

[Jimmy74]

Not in a 6 foot tank. Stunting occurs when a fish is kept in a tank which is too small for that species. There are other things which contribute to the size fish grow in tanks - the type of food fed to the fish vs its natural diet; chemicals added to a fish tank; even how well the tank is maintained.

I'm sure you're not trying to make me look silly after editing but just so we are all on the same page here is the original post...


In reference to your new question, a 6 foot tank for them is great IMO and more than most sold in stores will get.

In terms of wild vs tank bred I'm not 100% on this species but given how active they are and how fast the current in the tank could be a big factor, if you kept them in a riverine specialist big tank with an extremely high turn over rate would they bulk up? Could age be a factor like Rainbow Fish, quickish to 4 inches but slow to anything over that. Is there something dietry they are missing in captivity that prevents the bigger size? Could there be descrepencies between specimens? Are the giants we have in the hobby from the same location as the bigger size you are referencing? Are we 100% the ones in the hobby are not a hybrid of some kind, they are a common fish now so I wouldnt be surprised? The reason I list these options are because it feels unlikely they are not attaining closer to a wild size just because of growth suppressant in the water column which is what you usually see with stunting (as long as you are doing good weekly water changes).

Wills

I have many friends who kept these. None ever reached 6”.

 

[Jimmy74]

I'm sure you're not trying to make me look silly after editing but just so we are all on the same page here is the original post...


In reference to your new question, a 6 foot tank for them is great IMO and more than most sold in stores will get.

In terms of wild vs tank bred I'm not 100% on this species but given how active they are and how fast the current in the tank could be a big factor, if you kept them in a riverine specialist big tank with an extremely high turn over rate would they bulk up? Could age be a factor like Rainbow Fish, quickish to 4 inches but slow to anything over that. Is there something dietry they are missing in captivity that prevents the bigger size? Could there be descrepencies between specimens? Are the giants we have in the hobby from the same location as the bigger size you are referencing? Are we 100% the ones in the hobby are not a hybrid of some kind, they are a common fish now so I wouldnt be surprised? The reason I list these options are because it feels unlikely they are not attaining closer to a wild size just because of growth suppressant in the water column which is what you usually see with stunting (as long as you are doing good weekly water changes).

Wills

I'm sure you're not trying to make me look silly after editing but just so we are all on the same page here is the original post...


In reference to your new question, a 6 foot tank for them is great IMO and more than most sold in stores will get.

In terms of wild vs tank bred I'm not 100% on this species but given how active they are and how fast the current in the tank could be a big factor, if you kept them in a riverine specialist big tank with an extremely high turn over rate would they bulk up? Could age be a factor like Rainbow Fish, quickish to 4 inches but slow to anything over that. Is there something dietry they are missing in captivity that prevents the bigger size? Could there be descrepencies between specimens? Are the giants we have in the hobby from the same location as the bigger size you are referencing? Are we 100% the ones in the hobby are not a hybrid of some kind, they are a common fish now so I wouldnt be surprised? The reason I list these options are because it feels unlikely they are not attaining closer to a wild size just because of growth suppressant in the water column which is what you usually see with stunting (as long as you are doing good weekly water changes).

Wills

Looks like I’ll never get these answers so I’ll just play dumb and think they’re 100% happy

 

[Wills]

Looks like I’ll never get these answers so I’ll just play dumb and think they’re 100% happy

You posted 15 mins ago, lets give people a chance

Without knowing how the other fish were kept you just cant know what the difference is between the tank and the wild is exactly and why they are not getting to the bigger size. Danios are often a cooler water fish too so that could play a part, their respiration will be thrown off which will effect their metabolism? Maybe where they are from there is a cool winter that ties into their lifecycle and growth, like the Gymnogeophagus from South America - though a bit more extreme as if they don't get their cooling period they regularly die off before 24 months.

I'm not going to be able to give you a definitive answer but there are quite a few avenues here for you to explore

Wills

 

[Jimmy74]

You posted 15 mins ago, lets give people a chance

Without knowing how the other fish were kept you just cant know what the difference is between the tank and the wild is exactly and why they are not getting to the bigger size. Danios are often a cooler water fish too so that could play a part, their respiration will be thrown off which will effect their metabolism? Maybe where they are from there is a cool winter that ties into their lifecycle and growth, like the Gymnogeophagus from South America - though a bit more extreme as if they don't get their cooling period they regularly die off before 24 months.

I'm not going to be able to give you a definitive answer but there are quite a few avenues here for you to explore

Wills

Well like someone here said there’s often a difference between captive and wild size. Guess it’s just the way it is. I’ll opt to believe they’re all happy