RE: [RML] P. tenellus

Matthew Stanton (matthews at
Thu, 13 Jan 2005 10:21:36 +1100

Just read your latest Email but my thoughts anyway.

Blue-eyes inhabiting freshwaters are just as diverse as rainbows, if not
more so.
A few years ago when Ron Bowman published his 12 morphs of the Spotted
Blue-eye article and poster in FoS, I tried putting a picture of
Pseudomugil paskai up against the poster and the variation within just
these 12 morphs was enough (to my eye) to encompass P. paskai. (And
there are many more morphs out there).
Similarly, P. tenellus varies from catchment to catchment. The
differences are not always so obvious, however if you are serious about
this hobby you will respect those differences.
Having said that, if you have dirty or unnamed stock, you can still
appreciate them as aquarium fish. Just don't try to make them something
that they are not.

Research done by Effie Howe shows that Blue-eye eggs and presumably
sperm have significantly different surface structures. This may be the
reason for no hybridisation between species. There are probably
differences between different localities of the same species which may
also prevent breeding. More research needs to be done but I suspect the
"splitters" could have a field day with some of our Blue-eye species.

Speaking of which, Peter and Dave, was the Daly P. tenellus/signifer
issue ever resolved?

Anyone who is a member of this list but not a member of ANGFA, really
should join.
Fishes of Sahul is a pretty unique resource and back issues are
available for minimal cost to members.


-----Original Message-----
From: Julie Zeppieri [bowluvr at]
Sent: Thursday, January 13, 2005 4:57 AM
To: r_m_l at
Subject: RE: [RML] P. tenellus

Hey Gary,

So with them coming from Indo, with no known source location, the
dollar question is: Are they worth keeping? I know it really DOES matter
many Bows, such as trifasciata to name an extreme example, but how
is it with tenellus and gertrudae? I know some Blue-Eyes have very
populational differences, and my guess is that others are more
restricted so
do not. Where do these 2 species fall?

Thanks! :-)

Julie <><

>From: Gary Lange <rainbowfish4u2 at>
>Reply-To: r_m_l at
>To: r_m_l at
>Subject: RE: [RML] P. tenellus
>Date: Tue, 11 Jan 2005 11:11:13 -0800 (PST)
>I guess the question to start with is: Who is calling them the
>study strain? That might give us a clue. Put up a URL if a pic is
>somewhere. Via our friend Ron Bowman in Oz I brought in quite a few
>strains and got them into the hands of people that I thought might
>keep them around. Roy Hunter brought in a few strains too but I think
>of those were quickly lost as they just ended up going just out to the
>market. Also your question about tenellus Rarefish at LAX on Aquabid
>sells tenellus. They come in from Indonesia as they are raising them
>from NG now and shipping in. Same with gertrudae. Unfortunately no
>source. BTW this fish really needs a good source of live foods. I
>recommend not keeping them unless you're prepared to keep daphnia to
>them along with extras of mosquito larvae and perhaps blackworms. Live

>baby brine, really doesn't cut it but will do from time to time. They
>appreciate water ~ 100 ppm in the GH
> scale and a tad bit of Tetra black water tonic (or peat water
>That really helps to keep them happy.
>gary lange
>gwlange at
>Liz Wilhite <liz_wilhite at> wrote:
>While I'm asking the impossible... does anyone know the river that was
>the source of the M. duboulayi that is known as the rainbow study group

> >
> >If you find one, Liz -- let us all know...
> >
> >Kevmo
> > Does anyone know of a source of P. tenellus in the USA?
> >
> > Thanks,
> > Liz