FW flounders

[Fish00]

What are they like for a tank & they are pure FW because the whole saler keeps & breeds them in FW.

 

[CFC]

There is one genus of "flounder" that live their entire lives in freshwater and that is species of the Achirus genus. Achirus achirus is the most commonly seen of these but even this is a rare find in fish stores, much more commonly seen are species of the Brachirus genus which breeds in freshwater but adults need to live in brackish or marine enviroments. Species of either genus have not been bred in captivity to my knowledge. Species of both genus's are predators and will consume small fish such as guppies and tetras. A large tank with good water parameters is a must, tanks smaller than 30g would not be suitable for adult fish which grow to around 6 inches in most cases.

Achirus achirus

Brachirus salinarum

 

[Fish00]

Achirus achirus

Thats the one.
but it was £15.00

 

[jacblades]

not all achirus sp. are freshwater. often times, it is impossible to tell the difference between the species because the colors and patterns vary in each individual.
as many brackish fish do, most are born in freshwater and migrate into higher salinity waters as they age.
the ones in petstores are usually the american flounders as opposed to the south american ones. ahcirus achirus is south american.

the american flounders are also known as hogchokers, as farmers used to feed them to their hogs since they are not big enough for human consumption. and if they went down the wrong way, guess what?...

there is much conflicting info out there about these guys but i have been researching them for a while, as well as forming conclusions from my own experiences with them.

they are carnivores and will not touch vegetable matter ime. mine relish on tetras delica bloodworms (the gel packets) and i have eventually gotten them to take pellets. just make sure that the food SINKS. they rearely swim out in open water (they sort of 'scoot' across the bottom or the sides of the tank) but when they do, they are graceful and beautiful.
you must have sand for them.