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Hemigrammus Rodwayi
April 16, 2009
6:31 pm
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Fishwife
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I bought 5 of the above the other day, pretty little things but I'm wondering if I've got the right fish. All mine seem to have a pale blue stripe going along their bodies and I've never seen this described anywhere at all. Two of the fish shine the golden colour but the others are a definate silver but it's the pale blue line that I'm wondering about.

April 16, 2009
11:05 pm
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Matt
Málaga, Spain
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Is it this one?

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Cake or death?
April 17, 2009
10:22 am
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Fishwife
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Yes it looks like that one with the dark caudal fin, but where the black line is, on mine the line is pale blue. But I do notice that there appears to be a pale blue colouring on that pic. Do you think it's just because it's settling in?

April 17, 2009
11:07 am
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Matt
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I've been trying to find out the identity of this fish for ages and I don't think it's H. rodwayi as I've kept both species and the body shape is different in these, plus they don't grow as big. We used to get them in the shop as platinum tetras and they were always on the lists as H. vorderwinkleri but in the books that's a fairly plain bronzey-looking fish. The body shape and patterning is quite similar though so it's possible this is a form of H. vorderwinkleri infected with a parasite that causes guanin deposits to form in the scales resulting in that silvery platinum colour. Something similar causes the gold colour in some forms of H. rodwayi.

H. cf. vorderwinkleri is probably the most accurate id imo. /rolleyes.gif" style="vertical-align:middle" emoid=":rolleyes:" border="0" alt="rolleyes.gif" /> Oh and they keep the blue colour throughout life.

Cake or death?
April 17, 2009
1:50 pm
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ndc
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nice to see youre keeping things plain and simple still matt ! /laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" />

April 17, 2009
4:26 pm
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Eyrie
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QUOTE (ndc @ Apr 17 2009, 02:33 PM) < {POST_SNAPBACK}>
nice to see youre keeping things plain and simple still matt ! /laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" />


That's why I lurk rather than post - a lot of the discussions here are out of my depth /biggrin.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin.gif" />

Mature, sensible signature required for responsible position. Good prospects for the right candidate. Apply within.
April 18, 2009
10:10 am
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Fishwife
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Funny you should say about the bronze colouration as the ones that are showing what I said was gold, look to be more of a bronze colouring, especially near the caudal fin.

I'm not very good at guessing sizes but these are probably about 3 cm long, they look enormous next to the Embers but I think must be almost fully grown. The LFS I bought them from never gets size one fish only size two and three (whatever that means) but I can only guess as they never have tiny fish.

April 18, 2009
10:24 am
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Matt
Málaga, Spain
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QUOTE (ndc @ Apr 17 2009, 02:33 PM) < {POST_SNAPBACK}>
nice to see youre keeping things plain and simple still matt ! /laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" />

QUOTE
That's why I lurk rather than post - a lot of the discussions here are out of my depth

/laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" /> What can I say I have an enquiring mind. /tongue.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tongue.gif" />

Cake or death?
April 18, 2009
2:35 pm
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Fishwife
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I'm glad you have Matt at least we find the answers to our doubts /thumbs_up.gif" style="vertical-align:middle" emoid=":thumbsup:" border="0" alt="thumbs_up.gif" />

I've been taking a couple of pics. sorry for the quality, the camera as you can see is old, but it takes better fish pics than my newer one. The last two I've taken without flash and you can see the pale blue stripe better, even on the very blurred pic

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April 19, 2009
4:48 pm
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Matt
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Yup that's the one. You're right about them being almost fully-grown; I never got them much bigger than about 1.5"SL.

This is the gold form of H. rodwayi aka H. armstrongi in some of the older books. It's gold rather than silvery in colour. Grows to 2"+ and the eye is proportionately much bigger than in the platinum tetra.

[Image Can Not Be Found]

Pic credit: http://www.bollmoraakvarieklubb.org

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