I have a school of Nematobrycon lacortei coming... any reason to believe there will be problems with the Nematobrycon palmeri already in this tank???

[anewbie]

You should get some buces; they also love to flower:

has anyone else noticed that Nematobrycon, don't shoal as much as other tetras??? my mature palmeri are very independent, and the juvinals shoaled loosely with the other tetras, but now with a dozen 1 inch lacortei, that look a lot like the palmeri at that age, they are swimming all over the tank, not necessarily as a group... they are like baby lions, getting into trouble... and the lone spotted silver dollar, like a male lion... the lacortei, all seem to want to be near it, and the dollar doesn't like them in it's space, and gives them a half hearted chase for a couple inches, like a grumpy old lion... ironically if the dollar would give more of a chase, the lacortei, may school up, but it's a heavily planted tank, with lots to explore... looks like all the lacortei, look to have made it through the night... they came in between an inch and inch and a half, same size as my juvinal palmeri... I am seeing a little male coloration, on a couple, but they are really too small to color up fully

I have npaichthys kerri and they do not shoal much; however my n. epesi do.

 

[Innesfan]

I have npaichthys kerri and they do not shoal much; however my n. epesi do.

N. espei (note spelling--named after Heinrich Espe) consistently shoals more than any other Nannostomus species.
Another of its unique traits.

 

[anewbie]

N. espei (note spelling--named after Heinrich Espe) consistently shoals more than any other Nannostomus species.
Another of its unique traits.

Not to be disagreeable or maybe agreeable depending on how you interpret the comment but while the n. espei loosely shoal - n. marilynae tightly school most of the time. Btw if you want a very inexpensive but lovely nannostomus the marilynae are quite lovely esp in darker waters.

 

[Innesfan]

Not to be disagreeable or maybe agreeable depending on how you interpret the comment but while the n. espei loosely shoal - n. marilynae tightly school most of the time. Btw if you want a very inexpensive but lovely nannostomus the marilynae are quite lovely esp in darker waters.

I do disagree. N. marilynae do not normally shoal tightly unless sensing threat. I have 18 of 'em in my 75g along with N.espei, N. unifasciatus, Hoplisoma metae and a few others. The N. marilynae do not shoal until my dog presses his snout against the glass or I stick my arm in the tank for water changes. Whereas the N. espei shoal virtually all the time.

I agree they are lovely. As is the brilliant and charming woman after whom they are named. I am glad they are consistently being brought in correctly named and not as bycatch or misidentified. Though Dan's has had them as N. trifasciatus for the longest time despite repeated emails from me attempting to correct it.

 

[anewbie]

I do disagree. N. marilynae do not normally shoal tightly unless sensing threat. I have 18 of 'em in my 75g along with N.espei, N. unifasciatus, Hoplisoma metae and a few others. The N. marilynae do not shoal until my dog presses his snout against the glass or I stick my arm in the tank for water changes. Whereas the N. espei shoal virtually all the time.

I agree they are lovely. As is the brilliant and charming woman after whom they are named. I am glad they are consistently being brought in correctly named and not as bycatch or misidentified. Though Dan's has had them as N. trifasciatus for the longest time despite repeated emails from me attempting to correct it.

Hum; i guess i'm a threat So i am curious whom they are named after - mine do school in the 5 aquariums i have them including the large group of 35 in a 100 which oddly are quite content to join up with the morse code tetra (Hemigrammus sp. Morse Code) which are also a nice fish; though i do find the morse code to be closer to loosely shoaling often splitting up into several smaller groups - for those who are not familiar they are around the size of a ember tetra - maybe a tad smaller - not sure if any of these fishes require blackwater but i keep all three species in blackwater conditions (n. espei, n. marilynae and the h. sp morse code).

 

[Innesfan]

Hum; i guess i'm a threat So i am curious whom they are named after -

Any number of environmental factors can contribute to shoaling--light, vibrations, sudden external movements, tankmates, filter flow, etc

As for the namesake of the species--as I mentioned above, Stan Weitzman described and named this species for his wife, icthyhologist Marilyn Weitzman, who passed away in 2022 age 96, a few years after Stan passed in '17 age 90.

 

[Magnum Man]

these 2 lacortei have an iridescent turquoise stripe, that is not seen on the on the palmeri juvinals

...

 

[Mr Limpet]

Those are not Nematobrycon lacortei. They’re probably Hyphessobrycon melanostichos or H. cyanotaenia. At least you won’t have to worry about them hybridizing with your N. palmeri.

 

[anewbie]

Those are not Nematobrycon lacortei. They’re probably Hyphessobrycon melanostichos or H. cyanotaenia. At least you won’t have to worry about them hybridizing with your N. palmeri.

Well on the negative if accurate @Magnum Man didn't get what he ordered; on the bright side if Lapis Tetra those critters are expensive; and Blue Ribbon Tetra are not cheap (either).

 

[Magnum Man]

I guess it'll be interesting to see what they all are... the others look different, I just assumed those two were males??? the order said +3, so maybe they knew they had something else mixed in???

 

[Magnum Man]

BYW... it's amazing you guys can identify these fish from a poor quality, shaded photo of juvinal fish... I doubt I'll ever get to that point... I've seen "lapis" tetras lists before, but never seen one in person...

https://www.dansfish.com/product.detail/5721/Characidae-Tetras-Imperial-Lapis-Tetra-(Hyphessobrycon-melanostichos)

looks like Dan's has had the cyanotaenia before, as there was a previous listing, but no pictures were available...

https://www.dansfish.com/product.detail/5406/Characidae-Tetras-Lapis-Tetra-(Hyphessobrycon-cyanotaenia)