prova a guardare qui... per lumache e gamberi etc...
http://www.wetwebmedia.com/ca/volume...s/brackish.htm
i più dicono che non si possono allevare coralli in acqua salmastra...
qui invece dicono di si... il tipo risponde :
Yes, there are a few corals that live in mangroves, including hard corals. They encrust the prop roots. I'm not sure what their range of salinity tolerance is, but probably fairly modest. There are also some that live on the substrate and others that live in seagrass meadows (though these latter are usually normal marine environments with slight to no salinity variation). Soft corals in brackish water are a bit more diverse than hard corals, but there's not that many of either compared with their marine relatives.
http://www.fishforums.net/index.php?...-water-corals/
Comunque se cerchi "brackish coral" su un motore di ricerca trovi parecchie discussioni...