Fish You Wouldn't Keep In Any Tank.

[WILDER]

As you think they are not meant to be kept in a tank, also i think any fish that grows large, and are fast swimmers, that's a fair list gone,lol.

 

[BigC]

Redtailed Catfish. Phractocephalus hemioliopterus
Endearing when you see them at 6" in dealers tanks but they get too large and many people haven't got a clue about their eventual needs.
Bet kept for large public aquaria exibits.

 

[WILDER]

Koi

 

[Luke_e]

Arowana.. just too big for any tank imo.

 

[Durbkat]

An arowana can be kept in tanks as long as its over 200g. But piranas shouldn't be kept in tanks because if they fight the other pirana won't be able to get away like it would in the wild.

 

[Luke_e]

An arowana can be kept in tanks as long as its over 200g. But piranas shouldn't be kept in tanks because if they fight the other pirana won't be able to get away like it would in the wild.

Yes, but 200g is nothing compared to the size of if (in my opinion that is). As it just seems to large to be in any tank that fits in a home.

 

[CFC]

I wouldnt keep any species with an adult size above 30 inches, even a fish of this size requires a tank of 10x4x3 which is probably about the biggest tank anyone is likely to have at home.


On arowana's not all species grow as large as the silver arowana. Australian, Asian and black arowana's rarely grow larger than 2 feet and can easily be housed in tanks of 180 gallons or more.

 

[k2snowboards88]

The black finned cat shark. They're extremely fast swimmers. They grow up to be big. In the wild they start out in streams and slowly work their way out to the ocean. In the aquarium you have to start out freshwater and then later in their life start to slowly add salt, until its fully marine. Thats nearly impossible for everyone.

 

[OohFeeshy]

Hmmm.... Black pacus, TSN's, RTC's, koi...

 

[Lynden]

I dont think big fish cannot be kept, it just takes a bigger tank. They put cetaceans and sharks into tanks, right?

There is an invertebrate that i dont like to see in tanks, especially ones under 100 gal. That is sea anemones, they may live over a hundred years in the wild, but your lucky if they make it to a year in a tank.

 

[yvez9]

A fish I would never keep in home aquaria is a Piranha, way too messy and high maintenance

Discus as well, too fragile for my likings. I like to enjoy my fish, not stress about them

and of course, all those monsters everyone listed.

I would never keep a great white shark in a tank!

 

[IMCL85]

Electric cat fish I be freak out during water change .

 

[osteoporoosi]

Nothing over 12 inches long.

 

[!Gina]

large eels, some sharks you see in tiny displays (you know the type i mean).. it just doesnt look right

 

[dwarfgourami]

Chinese Algae Eaters. I never heard of anyone who wanted a fully grown CAE- and they do grow up.