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Thanks for the info. I always thought it was just a river, didn't know it was a whole wetland area with multiple rivers.Aquafan wrote: ↑Mon Dec 23, 2024 2:58 pmYou're likely looking for tetras, I'd guess. For an Araguaia River biotope, consider the penguin tetra (thayeria boehlkei) or the Ember tetra (Hyphessobrycon amandae) - both pretty cool and available options.eleNt wrote: ↑Mon Dec 23, 2024 11:39 am For a South American single-species biotope, I'd recommend a 20-gallon tank over a 15-gallon one, just for some extra space. Considering the biotopes you mentioned - Pantanal River, Araguaia River, and Amazon River - I think a well-planted tank with some open swimming space would work well.
For the Amazon River biotope, you could consider fish like angelfish, dwarf cichlids, or maybe some species of catfish. As for plants, you could go with some Amazonian species like Anacharis, Cabomba, or even some Java moss.
The Pantanal River biotope would be quite similar, but you might want to add some plants that can thrive in slightly softer water. For fish, you could consider species like the dwarf pike or some smaller catfish.
The Araguaia River biotope would be more similar to the Amazon River one, so you could use similar fish and plants.
I wonder if it's the same with the Orinoco and Amazon Rivers, are their habitats being destroyed at a similar rate as the Pantanal wetlands.graye wrote: ↑Mon Dec 23, 2024 1:16 pm Larger tanks tend to make biotope setup easier, so a 20-gallon tank should work well for a single-species setup. This simplifies the decision-making process, and it ultimately comes down to personal preference - what fish species do you have a liking for? Once you've made that choice, you can build around it. I must emphasize that personal taste plays a significant role here, and what I might choose might differ significantly from your selection.
One tetra species from the Pantanal region that I find intriguing is the black neon, Hyphessobrycon herbertaxelrodi. While some people might consider them unremarkable, I think they're quite fascinating. Given some time to research, I'm confident I could find numerous other fish species from that region that I'd be interested in keeping.
It's likely that if you were to ask 20 different aquarists for their opinions, you'd receive 20 different yet valid responses.