Mangrove Jack + GT
- Thread starter Eric A
- Start date
If you're talking about the Golden Trevally Gnathanodon speciosus, you may only really keep them in a brackish tank (perhaps quite strongly brackish) for very short term, as these guys do largely perfer marine water anyway. Beyond that, based on other Trevally species, this species can also be expected to grow relatively fast, if it is as well fed as it is in the wild. Even if it isn't, though, compared to regular aquarium species, they're still large, fast(ish) growing fish.
Mangrove Jacks also get pretty large, although I'm quite unsure about just how big they get. From what I've heard, the land-locked true freshwater specimens tend to stay a little smaller than their brackish/oceanic counterparts. How much smaller I can't tell you. Even so, a large, predatory fish such as this one aren't really suitable for a 3' tank for very long, given their verocious appetites and subsequent high protien waste. It might work if you undestock the tank, give it some good filtration and then also give it regular water changes... but once the Jack gets to 20cm or so I'd start looking for much bigger accommodation...
As for mixing, its a hit and miss situation. Jacks are pretty predatory, although I'm not sure if they'll go for similar sized fish. The info on keeping these species in aquariums is very sparse, so finding out if they're compatible is going to be more of a trial and error than anything else. All I can say is, if you're going for these guys, best of luck.
Mangrove Jacks also get pretty large, although I'm quite unsure about just how big they get. From what I've heard, the land-locked true freshwater specimens tend to stay a little smaller than their brackish/oceanic counterparts. How much smaller I can't tell you. Even so, a large, predatory fish such as this one aren't really suitable for a 3' tank for very long, given their verocious appetites and subsequent high protien waste. It might work if you undestock the tank, give it some good filtration and then also give it regular water changes... but once the Jack gets to 20cm or so I'd start looking for much bigger accommodation...
As for mixing, its a hit and miss situation. Jacks are pretty predatory, although I'm not sure if they'll go for similar sized fish. The info on keeping these species in aquariums is very sparse, so finding out if they're compatible is going to be more of a trial and error than anything else. All I can say is, if you're going for these guys, best of luck.
Thanks Tim.
I recently had the sudden urge to keep some of our native brackish and saltwater species. Much like yourself. I don't know if it is a 3' or no, i'll just look around for a cheaper tank.
The tank won't be heated at all, just filtered by an external canister filter, and a fluro light on top.
Since your here tim, what species of gobies etc do you think I have the chance of getting around my way? I've never been into true brackish territory, only salt and fresh.
I recently had the sudden urge to keep some of our native brackish and saltwater species. Much like yourself. I don't know if it is a 3' or no, i'll just look around for a cheaper tank
.The tank won't be heated at all, just filtered by an external canister filter, and a fluro light on top.
Since your here tim, what species of gobies etc do you think I have the chance of getting around my way? I've never been into true brackish territory, only salt and fresh.
In the shallower waters, you should have a good chance of catching some nice sleeper or even ture gobies - I had some luck in catching several Eleotris sp. as well as a Glossogobius sp. These same genera also occur along the Australian coast.
You should also have some luck with some larger species. Though normally commonly avaliable in the trade, you should be able to fish for some full-sized Monos and Scats, both of which may occur in both salt and brackish waters regularly.
You should also have some luck with some larger species. Though normally commonly avaliable in the trade, you should be able to fish for some full-sized Monos and Scats, both of which may occur in both salt and brackish waters regularly.
Keep us updated, where you live, there are some amazing fish lurking beneath those waves.... not to mention some real monsters as well. 
the mangrove jacks/snappers are a decent fish for a single fiah setup...although will need a bigger tank