Fresh Water Moray Eel (Gymnothorax polyuranodon) - are these active fish ?

qguy · May 7, 2019

Are these active fish or do they just sit inside a cave and wait for food ?

Will it look "lost" in a 250g tank? the one I plan to get is 14 inches long

fishhead0103666 · May 7, 2019

Fat Homer

moe214 · May 8, 2019

Wrong area for this but someone who’s got experience with them is

DB junkie

Malte81 · May 8, 2019

They are active when they have the right tankmates.
They don't like big fast swimming fishes.
Agressive tankmates are also a problem.
When you don't have the right tankmates they will only come out for food.
In my experience they do best in a peacefull community setup.
I don't know if this will change once they reach a bigger size.
I have 3 with big plecos and Arowana and they only come out for food or during the night.

neko1 · May 8, 2019

they aren't really active, just hide inside rocks until night. they do need brackish

qguy · May 8, 2019

Just got the fish, did not realize that a 14 inch eel was so thin, yup he would be lost in the 250g tank. I made him a small compartment in the sump, roughly 20 gallons and he still lost in that section

neko1 · May 8, 2019

qguy said:
Just got the fish, did not realize that a 14 inch eel was so thin, yup he would be lost in the 250g tank. I made him a small compartment in the sump, roughly 20 gallons and he still lost in that section

how do u plan to get them into a brackish tank? just add a little over time or use a dripping methode?

fishhead0103666 · May 8, 2019

neko1 Why are you so sure they're brackish?

Rocksor · May 8, 2019

neko1 said:
how do u plan to get them into a brackish tank? just add a little over time or use a dripping methode?

Are you certain they need brackish? According to this study they are found in both freshwater and brackish as adults and juveniles

Is the elusive Gymnothorax polyuranodon really a freshwater moray? - PubMed

<p>Analysis of 36 records of the rarely encountered moray Gymnothorax polyuranodon indicate that juveniles and adults inhabit fresh and mildly brackish habitats (salinity < 5) in streams of the Australian Wet Tropics Eighty-one per cent of these records were from freshwater streams and...

www.ncbi.nlm.nih.gov