From my experience, there is no such thing as a freshwater moray eel. However im not too sure about this one from Australia, maybe that species has evolved over many many years and is now freshwater but from extensive research and experience ( i owned 2X G.tile) there is no such thing as a "freshwater moray eel". The petshops here in Cape Town have been selling them lately. They sell them as freshwater moray eels due to the fact that the guys hwho catch the eels in the wild, catch them in shallow estuaries (brackish water) and abit further upstream in freshwater. Therefore they tell this to the suppliers and petshop owners and they get sold as "freshwater morays", but in actual fact they are only going into the river mouths and estuaries to breed. The older/larger specimens are the breeders and the younger/smaller specimens are the newborns.
My first freshwater moray i had, went on a hunger strike from the day i got him. They go on hunger strikes due to not being happy in the environment, ie. freshwater tank. He died within a month. I swore to never ever get another one, no matter hw cool this fish is, because no matter what. . .they are marine/brackish. But a year went by and i came across a guy that works in one of the petshops here, he had one at home but swore to me that it has acclimatised to the freshwater and is happy and eating. Before i bought it, i witnessed it feeding. So i bought it, and he was right, it seemed happy in my tank and was eating correctly. I had it for 6 months with no problems, him and my Jag got on well. But all of a sudden i noticed a "bubble" just behind his gills, it was his swim bladder, i researched it and came to the conclusion that this happens when the marine animal is spending to much time in a freshwater environment. The eel died a week ago :-(
To conclude. . .There is no such thing as a freshwater moray. . .
