Salt Water In Fresh Water

[serpent]

can any thing connected with saltwater live in freshwater ie any salt water animal

 

[Mr Miagi]

Generally, No. But some fish species migrate into salt water from freshwater or visa versa in their life-cycle. Why?

 

[richard t]

Bull sharks live where ever they like. Salt, brackish,fresh. I would think some other species of fish may be able to do this. Not herd of any fish that you could buy in a lfs that would happily cross from salt to fresh. Maybe Sailfin mollies, i think they can be found in salt water in the wild.
It is probably common to here of some fish tolerating different salinaties. But thats different to living happily.

 

[Fish Fingers]

This guy is supposedly a troll Miagi (he has another post where numerous members thought so). So I wouldn't put too much effort in to answering his questions, he most likely is just trying to piss people off.

 

[richard t]

Bull sharks live where ever they like. Salt, brackish,fresh. I would think some other species of fish may be able to do this. Not herd of any fish that you could buy in a lfs that would happily cross from salt to fresh/fresh to salt. Maybe Sailfin mollies, i think they can be found in salt water in the wild.
It is probably common to here of some fish tolerating different salinaties. But thats different to living happily.

 

[Navarre]

Its a fair question i guess so i wont treat it as a troll. However very few aquarium animals will make the transition across to either salt or freshwater. It would help more if we could understand your plans and what you intend trying to keep.

 

[serpent]

hi

hi there

hey fish fingers i really didnt know an aquarist near my place told me tht marine aquariums need dissolved salt in frsh water them and i really did nt know abut salt water aquariums

and the iodised ssalt was a guess made byy a friend of mine

 

[Fish Fingers]

Alright if that's true I'm sorry. I was just going buy what the others said .

 

[serpent]

i want what animals like corals anemones and other inverts tht live in sea water can live in fresh water

 

[crazyelece]

None of the invertabrates can switch that I am aware of. As far as fish I do know there are a few brackish that you can lean over into full salt over time and I believe a few fresh. But it is difficult and is not the best for the fish. The only valid reasoning I have seen to change is to try and get a feeder from fresh to salt in order to use for food for aggressive marine fish.

 

[steelhealr]

Troll or not...rapid introduction from one environment to the other without acclimation will most likely cause death. One main reason is osmosis. An animal existing in SW that is rapidly placed in FW will have FW diffuse " across a semipermeable membrane into a higher concentration of electrolytes'. The animal will swell and die. Reverse the situation and a FW animal will rapidly dehydrate. SH

 

[Donya]

There is one snail in the Neritidae family I am aware of with that ability: Neritina reclivata. However, they have a population that naturally ranges all over the place, following a salt wedge up a stream and then winding up in full fw in some areas (some populations are even cutoff from sw access). Ones raised in fw do well in fw, but ones raised in higher salinity don't seem to. Individuals that prefer marine/brackish can "suvive" fw for a time, but IME they quit eating and die unless taken quickly back to their prefered salinity. I don't know what the response of fw-raised ones is to introduction into a marine environment, but I have heard 2nd hand that the lifespan is significantly shortened. Other members of Neritina are supposed to be able to do this, such as Neritina virginea, but although that species has the same range as reclivata I have found it far less hardy to salinity changes. "True marine" members of the family (Nerita and Puperita genera to name a couple) cannot tollerate fw, or even a salinity dip into brackish. The adaptation seems to be unique to Neritina as far as tollerance for the full salinity range to varying degrees. The "freshwater" Theodoxus species in the family from brackish to fresh but are not found in marine environments to my knowledge.

 

[CutieWitBooty]

There are no inverts or corals to my knowage, but i know some brackish fish can go in either salt or fresh. In my bigger tank i had a couple freshwater mollys (one balck on white, they actully glowed pretty cool under marine lights) in my marine tank.

 

[RoyalGrammaPrincessHannah]

IMO, it just shouldn't be done. It is completely unnecessary and pointless.

 

[crazyelece]

well its not unnessacery or pointless if done for the right reasons. Such as (mollies are a good example) mollies used as feeders for a lionfish or eel. If acclimated correctly you can then feed them temp before using them as feeders and thus know what you are feeding your other fish. It is much better to do something along these lines as oposed to feeding them FW feeder goldfish. But as far as doing it to keep a particular animal for display, I agree it is pretty pointless and not to the animal's benefit.