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Oddball said:
The depth range for the species is 1 - 50 meters making it a close inland species. That means Arothron hispidus has evolved to adjust for rapid decreases in salinity associated with rainfall and large FW dumps from river deltas. Unfortunately, it also means that unscrupulous vendors will try passing marine species as FW variants that will likely live long enough to reach customer tanks but will eventually become maintenance roller-coasters in a short time later.

The same thing happened about 20 years ago with a coastal seahorse species. A biologist discovered fossil remains of a possible FW seahorse species. Within a year, several vendors were offering FW seahorses for astronomic prices. The problem being that the biologist never found any living representatives of the species and the specimens being offered for sale exctly matched a marine species. People still lost money before the full truth of the hype campaign came out.
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Thanks! Anything specific to look for in the fish (appearance/appetite etc) that could lead to an insight in the truth?
 
The salinity of brackish water is 1.005 - 1.010. The species is listed to occupy zones with a SG of a minimum of 1.020. IMO, it may survive for a long haul at the high end of the brackish scale but, not be at peak health unless maintained in its evolved comfort zone. The range difference may not seem like much on paper. But, it brings alot of stress on the physiology of the species when pertaining to osmotic regulatory processes.
 
UnstoppableJayD said:
Thanks! Anything specific to look for in the fish (appearance/appetite etc) that could lead to an insight in the truth?
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This one is difficult. The species has a large color and pattern dimorphism within a niche. That means you can find huge differences in color and pattern between 2 specimens that hatched and grew on the same reef or in the same cove.

I'm checking for a pic timeline of species maintained in brackish or fresh conditions. Unfortunately, it's easy for a pic description to be marked as FW while the truth about the fish in the pic being that its water is brackish or more.
 
Charney said:
google maps?


My solution was to have Jay buy the lot and see how they are in a year.
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sorry failed attempts at sarcasm

bottles said:
Thanks for the link, Jay. It says in the description, "almost pure freshwater".
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I asked the seller the response was: "That is where they live. 1.004 salinity. I fresh well water now."
 
Keep us posted if you pick one up. I have my doubts about a full healthy life in freshwater, but possibly in brackish conditions.
 
Oddball said:
This one is difficult. The species has a large color and pattern dimorphism within a niche. That means you can find huge differences in color and pattern between 2 specimens that hatched and grew on the same reef or in the same cove.

I'm checking for a pic timeline of species maintained in brackish or fresh conditions. Unfortunately, it's easy for a pic description to be marked as FW while the truth about the fish in the pic being that its water is brackish or more.
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So you did find literature of them found in fresh?
 
No. I've only found sale pics "claiming" the species is being kept in FW. The only published papers I've found so far linking Arothrons to FW is in providing FW bath (dip) treatments.
 
Just throwing my 2 cents in here, but these puffers are commonly passed off as freshwater fish in Asia it seems, but in reality are a high-end brackish / marine fish...

Kinda like how you commonly see GSP's and F8's passed of as being freshwater fish around these parts...


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Fat Homer said:
Just throwing my 2 cents in here, but these puffers are commonly passed off as freshwater fish in Asia it seems, but in reality are a high-end brackish / marine fish...

Kinda like how you commonly see GSP's and F8's passed of as being freshwater fish around these parts...


Sent from my iPhone using MonsterAquariaNetwork app
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Thanks, thats what i was hoping and fearing to hear.....
 
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