Pencilfish identification

[Qrak]

Hello, I've been lurking around here for quite some time now, but this is my first post here, so welcome.
Recently, I bought some pencilfish. They were sold as N. nitidus, but I couldn't get a good look at them in the store. When I put them in my tank I realised they don't look at all like nitidus, they are more slender and don't have almost any red coloring. When I compared them with pictures online, they are most similar to the N. cf. minimus from Colombia, which I found on Tom's site. Right now, they are about 2 cm in length and are still quite timid, but I managed to take some pictures of them. Could you help me identify them?

Best regards,
Marcin.

 

[ButtNekkid]

Hi,

No input on ID but...
Might I persuade you to share more pictures of your tank?

 

[Qrak]

Sure. It's a standard 60x35x35cm tank. It also houses a pair of A. atahualpa.

Best regards,
Marcin.

 

[Aqua Neptun]

Конечно. Это стандартный танк 60х35х35см. Здесь также обитает пара A. atahualpa.
View attachment 9456
View attachment 9457
View attachment 9458
С уважением,
Марчин.

Похоже на твою рыбу?

 

[Tom C]

These fishes are either Nannostomus (cf.) minimus, or Nannostomus marilynae.
The two reddish oblique bands on your fish looks more like those on N. marilynae than on N. (cf.) minimus, but I can not from these photos say which one, as there is no good picture of the males' anal fin.
The males of N. marilynae have a short anal fin, a little bit modified, but not much longer than the anal fin of females.
The anal fin of the N. (cf.) minimus males are greatly modified and much longer than in females, like seen on Nannostomus digrammus.

 

[Qrak]

Похоже на твою рыбу?

No, they are much slimmer.

These fishes are either Nannostomus (cf.) minimus, or Nannostomus marilynae.
The two reddish oblique bands on your fish looks more like those on N. marilynae than on N. (cf.) minimus, but I can not from these photos say which one, as there is no good picture of the males' anal fin.
The males of N. marilynae have a short anal fin, a little bit modified, but not much longer than the anal fin of females.
The anal fin of the N. (cf.) minimus males are greatly modified and much longer than in females, like seen on Nannostomus digrammus.

I looked through your pictures and I see what you mean, but I have too little experience to tell. To make matters worse, right now I have a serious outbreak of green water in the tank so I can hardly see (let alone take pictures!) the fish. I found some old pictures that may tell you something.

Thanks for your help!
Best regards,
Marcin.

 

[Tom C]

They look like Nannostomus marilynae to me....