Small Macrobrachium from Peru (Need an ID)
Moderator: Mustafa
Small Macrobrachium from Peru (Need an ID)
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Last edited by pturley on Thu Mar 29, 2007 6:38 am, edited 1 time in total.
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FISH WORLD ERIE
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YuccaPatrol
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Hey Paul and Jason,
You might want to perform a search for "Euryrhynchus" in this forum. I have said quite a few things about this species that might be helpful. This is a very shy species that lives extremely hidden. In a normal setup (i.e. not a holding tank) you won't see these guys during the day at all. Hence, they might not be all that interesting for most shrimp hobbyists. I still like them, even if I only see their heads poking out of their hideouts once in a while.
Paul...I noticed that the specimen in your picture is extremely stressed out. The milky, washed out colors are a dead giveaway. The picture of the male from the link you provided is also of a stressed out individual.
When these guys are not stressed out, they have distinct, clear coloration. That might explain the fact that your animals are brownish.
However, there are several species of Euryrhynchus sp. in the Amazon basin, so you might just have a different species from what I have here. Either way, it's quite stressed out and I hope that your animals recover and survive.
Here is a picture of an ovigerous female that I took about 5-6 months ago. It gives you an idea of what a relatively healthy specimen looks like:
This female was still slightly stressed out still since she had just molted, so there is some residual "milky" coloration. As you can see the eggs are huge. They only carry about 10+ to 20 or so eggs (max) and the young hatch fully developed. The behavior of these shrimp is extremely similar to dwarf crayfish (i.e. they don't swim like shrimp, but just walk around or dart back like crayfish) and their young even look almost exactly like dwarf crayfish young.
In any case, currently I only have 3 females so I can't really breed these guys (I only received females and some babies originally) until I get males, but again...this shrimp will probably be just something for the really hardcore shrimp specialists due to its extremely nocturnal habits. Maybe other species of Euryrhynchus are more diurnal, but mine definitely are not. There is also a possibility that captive-bred specimen might become more active during the day due to lack of predators (captive-breds never even see predators whereas the wild-caughts have at some point).
In any case...good luck with these guys and keep us all up-to-date.
You might want to perform a search for "Euryrhynchus" in this forum. I have said quite a few things about this species that might be helpful. This is a very shy species that lives extremely hidden. In a normal setup (i.e. not a holding tank) you won't see these guys during the day at all. Hence, they might not be all that interesting for most shrimp hobbyists. I still like them, even if I only see their heads poking out of their hideouts once in a while.
Paul...I noticed that the specimen in your picture is extremely stressed out. The milky, washed out colors are a dead giveaway. The picture of the male from the link you provided is also of a stressed out individual.
When these guys are not stressed out, they have distinct, clear coloration. That might explain the fact that your animals are brownish.
However, there are several species of Euryrhynchus sp. in the Amazon basin, so you might just have a different species from what I have here. Either way, it's quite stressed out and I hope that your animals recover and survive.
Here is a picture of an ovigerous female that I took about 5-6 months ago. It gives you an idea of what a relatively healthy specimen looks like:
This female was still slightly stressed out still since she had just molted, so there is some residual "milky" coloration. As you can see the eggs are huge. They only carry about 10+ to 20 or so eggs (max) and the young hatch fully developed. The behavior of these shrimp is extremely similar to dwarf crayfish (i.e. they don't swim like shrimp, but just walk around or dart back like crayfish) and their young even look almost exactly like dwarf crayfish young.
In any case, currently I only have 3 females so I can't really breed these guys (I only received females and some babies originally) until I get males, but again...this shrimp will probably be just something for the really hardcore shrimp specialists due to its extremely nocturnal habits. Maybe other species of Euryrhynchus are more diurnal, but mine definitely are not. There is also a possibility that captive-bred specimen might become more active during the day due to lack of predators (captive-breds never even see predators whereas the wild-caughts have at some point).
In any case...good luck with these guys and keep us all up-to-date.
Last edited by Mustafa on Thu Nov 23, 2006 7:13 pm, edited 1 time in total.
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FISH WORLD ERIE
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FISH WORLD ERIE
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Neonshrimp
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Neonshrimp
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FISH WORLD ERIE
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