needlefish?

[OrionGirl]

For a short period of time, yes, brackish fish can survive in FW. But, long term, they need salt. Without it, they will be prone to diseases and parasites, and a much shortened life span.

Conditions in a LFS are seldom considered long term, healthy setups.

 

[snakeskinner]

some brackish fish, not all. Many "brackish fish" simply live there some of their life. Many migrate back and forth and live in salt , brackish and freshwater. A couple of rivers here in Oklahoma have a high salt content (better than brackish from what I've heard) but there are the same fish you find in freshwater found there. KYle