Euryhaline fish?

[phreeflow]

Can’t remember where I read the article but someone claimed he kept certain species of clownfish in light brackish.

Curious if anyone knows of any euryhaline saltwater fish that were kept successfully in fresh or light brackish.

Not talking about something impossible like bull sharks, or fresh/brackish fish like mollies, scats, green spotted puffers.

Besides bumblebee groupers, tarpon, or barramundi, what other saltwater fish have been kept in fresh/brackish aquariums?

 

[Deadeye]

I haven’t heard about any light brackish clowns - there is a species of damsel that can survive in full fresh (or light brackish) thought, as well as a few blennies and gobies. Those particular species likely can’t tolerate marine water though.
Gymnothorax polyuranodon can tolerate a large swing, I think up to marine, but does best in fresh to low brackish.
It could have been that the clowns in question were being held in a hyposalinity treatment to fight ich.

 

[jjohnwm]

I've never tried it, but this idea has been stuck in the back of my head for awhile now:

https://thebrackishtank.tumblr.com%2Fpost%2F98504151993

Specifically, the point at which they mention that the species is found in nature at salinities as low as 1.006! I'm curious if that is a long-term thing for these fish, or if perhaps they are referring to specimens that are making brief forays into the very light brackish zone.

 

[phreeflow]

I've never tried it, but this idea has been stuck in the back of my head for awhile now:

https://thebrackishtank.tumblr.com%2Fpost%2F98504151993

Specifically, the point at which they mention that the species is found in nature at salinities as low as 1.006! I'm curious if that is a long-term thing for these fish, or if perhaps they are referring to specimens that are making brief forays into the very light brackish zone.

That’s interesting. 1.006 is very low…it’s probably not longterm but sure makes you think of the possibilities

 

[phreeflow]

I haven’t heard about any light brackish clowns - there is a species of damsel that can survive in full fresh (or light brackish) thought, as well as a few blennies and gobies. Those particular species likely can’t tolerate marine water though.
Gymnothorax polyuranodon can tolerate a large swing, I think up to marine, but does best in fresh to low brackish.
It could have been that the clowns in question were being held in a hyposalinity treatment to fight ich.

I couldn’t find the article where the guy was talking about his clownfish being successfully raised in brackish for the last 3 years.

However, I found this research paper discussing how Skunk Clownfish juveniles, 30 days post hatch, survived salinity levels from as low as 6ppt up to 52ppt before suffering any losses. 6ppt is a specific gravity of just 1.004!

Breeding, embryonic development and salinity tolerance of Skunk clownfish Amphiprion akallopisos

Breeding and rearing some of the clownfishes most commonly used in the aquarium trade actually represent an economical and ecological tool for broaden…

www.sciencedirect.com

 

[Deadeye]

I couldn’t find the article where the guy was talking about his clownfish being successfully raised in brackish for the last 3 years.

However, I found this research paper discussing how Skunk Clownfish juveniles, 30 days post hatch, survived salinity levels from as low as 6ppt up to 52ppt before suffering any losses.

Breeding, embryonic development and salinity tolerance of Skunk clownfish Amphiprion akallopisos

Breeding and rearing some of the clownfishes most commonly used in the aquarium trade actually represent an economical and ecological tool for broaden…

www.sciencedirect.com

Interesting - almost makes me want to get a brackish tank with them in it…like I need another tank with a psycho aggressive fish (clowns are evil incarnate)…
duanes could talk about a number of cichlids that can tolerate full marine.

Also worth mentioning are salmon, American eel, and lampreys, but I doubt we are keeping those frequently in tanks.
Guppies can also go full salt, though mollies are better at it.

 

[tlindsey]

I personally believe fish should be kept in their natural water environment for example the Bumblebee Grouper. People who sells fish come up with these false statements. I never heard of a brackish water clownfish or a brackish water volitan lionfish.

 

[phreeflow]

Interesting - almost makes me want to get a brackish tank with them in it…
duanes could talk about a number of cichlids that can tolerate full marine.

Also worth mentioning are salmon, American eel, and lampreys, but I doubt we are keeping those frequently in tanks.
Guppies can also go full salt, though mollies are better at it.

I’m curious too but wouldn’t try it without conclusive evidence. But it makes you think. Many freshwater fish can handle some salinity, especially very light brackish. Would be a sight to see some cichlids swimming around with lionfish or clownfish if it were possible

 

[Deadeye]

I’m curious too but wouldn’t try it without conclusive evidence. But it makes you think. Many freshwater fish can handle some salinity, especially very light brackish. Would be a sight to see some cichlids swimming around with lionfish or clownfish if it were possible

If it could be done, I doubt it would be sustainable long term. If not for chronic issues developing, then probably because a black belt Vieja (the cichlid that tolerates marine really well) would end the cohab pretty fast.
Here’s a thread I made a while ago:

Marine cichlid?

Gonna guess this is a no, and I don’t plan on trying anything...kinda just a curiosity question. Is there any cichlid that can live its life in marine? I ask because I know certain viejas migrate into the ocean occasionally for food, so I would assume they have quite a good salt tolerance...

www.monsterfishkeepers.com

 

[phreeflow]

I personally believe fish should be kept in their natural water environment for example the Bumblebee Grouper. People who sells fish come up with these false statements. I never heard of a brackish water clownfish or a brackish water volitan lionfish.

I agree with you, don’t get me wrong, fish should be kept in as close to natural and ideal conditions. However, I’ve seen plenty of bumblebees and tarpon in freshwater/brackish tanks. I haven’t kept either so I have no clue how that’s possible.

I’m assuming juveniles stay in shallow fresh/brackish areas to grow then venture back out to the ocean when bigger. Does something happen to them physiologically, where they suddenly can’t handle those conditions anymore when they get bigger?