what freshwater fish can live in salt

i know mollies are ok in saltwater and guppies.does anyone know of others that can be converted?i would love to try neon tetras but idk

 

First of all, it really depends on how salty you want to keep your water. Mollys are brackish fish. They can be ok at SG of 1.010 or so. But if you keep your SG at around 1.023 or so, your mollys won't last too long, even if you acclimate them very slowly.

 

they are not "ok" at first, they need to be slowly worrked into salt water, start off brackish and bring it up slowly, there is also a brackish puffer, tetras would surley die

 

It's not aquaria related, but I know Tarpon and Salmon live in both. Snook too. Not sure about trout.

 

and some sharks. We had one come out of the GoM up the ship channel and all the way up to downtown Houston through our Buffalo Bayou (this is Bayou city after all :)

it was on the news... never did follow up to see what happened to it... now I'm curious... I'll see if I can find the article.

 

Yup, Bull sharks can go in freshwater. They can go many miles up freshwater streams. watched a show on Animal Planet about it.

 

The only trout I know of which will tolerate sea water and freshwater is (Salmo trutta) the brown trout aka sea trout.

 

Woops got off topic. I know some puffers that are brackish can be acclimated to SW. Not sure about neons. I would think if they are true freshwater, not brackish then no you cant do it.

 

Most freshwater fish will live is slightly brackish conditions but not in true salt water. This is seen in many estuaries, with a large number of freshwater species moving in and out of estuarine conditions. Only a small number have bridged the gap and will go into saltwater like the 3 spined stickleback (a cold water example) and the molly (warm water example) both will happily spawn in sea water or freshwater.

 

I bet you could do it over a very long period of time. When I say very long I mean as long as a year. Its hard to say without trying but for the price of tetras its worth a try. I can see the draw to this they would look awesome in a reef because they are great schooling fish.