Misidentified Brackish Fish

[SubRosa]

I'm interested in hearing what species of true marine fish others here have seen for sale as brackish fish.

[Pufferpunk]

Many BW fish prefer marine conditons as adults, like Green spotted puffers, monos & scats. Many marine fish spend a lot of time in BW as juvies, like dogface puffers but are really marine fish. Many marine fish visit BW but are strictly marine fish.

[NYCguppydude]

Moray Eels!

[SubRosa]

Many BW fish prefer marine conditons as adults, like Green spotted puffers, monos & scats. Many marine fish spend a lot of time in BW as juvies, like dogface puffers but are really marine fish. Many marine fish visit BW but are strictly marine fish.
Monos and Scats are not true marines, they're anadromous like Salmon. GSPs have never done well for me in full strength seawater. And I've never seen a Dogface offered as a brackish fish. The White Cheek Morays are a good example of what I'm looking for. Any other experts out there? Amph?

[blue2fyre]

I've seen snowflake eels sold as brackish/freshwater eels.

[SubRosa]

I've never actually seen an Echidna nebulosa which is the true Snowflake called brackish, but I have seen another species that was gold spotted and was called a Snowflake.

[Amphiprion]

Okay, I see where part of the misunderstanding is coming from. Every professor and book that I've come in contact with has made differentiations in terms of anadromous--in other words, marine and anadromous are not mutually exclusive, depending on who you talk to. NOAA seems to think they are mutually exclusive, whereas when you look in much of the peer reviewed literature, they are not. For example: http://resources.metapress.com/pdf-preview.axd?code=k4lq817u16623323&size=largest

That is part of what was confusing me as you were describing these fish. FWIW, monos and scats are actually amphidromous, moving back and forth almost daily. There are also distinctions to be made, since many anadromous fishes temporarily live in freshwater or even brackish water at a cost. It requires physiological changes that the fish may or may not be able to cope with for long periods of time. Salmon, as in your example, are a similar case. They are in rough shape by the time they spawn, since they are no longer capable of tolerating fresh water for very long. The problem with all of this is that tolerance is more along the lines of a continuum, so the lines fade quite a bit between species, making many of the terms, especially when used in certain contexts, extremely artificial. Nor do they denote preferences or in which environment a fish does better indefinitely.

Edit: In this case I think you and I both may be just spinning our wheels, so to speak

[SubRosa]

Given the overlap in the definitions I can possibly agree with you regarding Scats, but not Monos. The trigger for spawning Monos is to reduce salinity to freshwater levels. That is the textbook definition of anadromous. In regards to Scats I base the designation on the fact that juveniles fare much better in FW than larger individuals, but since they haven't been spawned in captivity to my knowledge the trigger is unknown. There are other factors that could account for my observations.

[BioHazard]

:popcorn:

[Amphiprion]

Given the overlap in the definitions I can possibly agree with you regarding Scats, but not Monos. The trigger for spawning Monos is to reduce salinity to freshwater levels. That is the textbook definition of anadromous. In regards to Scats I base the designation on the fact that juveniles fare much better in FW than larger individuals, but since they haven't been spawned in captivity to my knowledge the trigger is unknown. There are other factors that could account for my observations.

I agree to one degree or another and that fits my observations as well, honestly.

[Pufferpunk]

I saw q giant school of monos in the Philippines.

[Piranha86]

I bet most wild caught 'brackish fish' are caught as juveniles in near-fresh water. There are no true brackish fish in my opinion, for example, you can keep mollies in pure fresh as long as it's hard and a Fahaka puffer needs gradually more salt as it grows. A lot of fish do swim inland to breed, as it is safer from predators.

[SubRosa]

I bet most wild caught 'brackish fish' are caught as juveniles in near-fresh water. There are no true brackish fish in my opinion, for example, you can keep mollies in pure fresh as long as it's hard and a Fahaka puffer needs gradually more salt as it grows. A lot of fish do swim inland to breed, as it is safer from predators.How much can you afford to lose on this bet? If it's safer to swim into FW to have your babies why do American Eels which live in the "safer" FW environment swim into SW to have theirs?

[jpappy789]

anadromous: live in saltwater, breed in freshwater (salmon, smelt, etc.)

catadromous: live in freshwater, breed in saltwater (most eels)

It's not just one way...

[Pufferpunk]

a Fahaka puffer needs gradually more salt as it grows
HUH??? Fahakas are strictly a FW fish.