Without doubt the
“surinamensis” complex
is one of the most confusing assemblages of
closely related species. It is unclear exactly
how many species are available in Australia
although a larvophile form pictured right and a
second group, G. cf. surinamensis , which is an
ovophile breeder (Aqualog: S32345) have been
identifed thus far. The group seems to comprise
many other similar species and whether these
exist in Australia is a matter of some
contention. This means however, that care must
be tank when selecting G. “surinamensis”
for breeding purposes. The larvophile form has a
black underside to its throat and this may be of
some value in distinguishing the two types.
Adult “surinamensis” are truly stunning
fish, with irradescent stripes and long flowing
fin filaments. They are relatively unfussy with
regard to water quality however, they may
develop hole in the head disease if kept at too
high a pH. These fish are quite peaceful even
retiring and hiding places in dense plant growth
or logs are appreciated by the species.
Origin: Guyana & Surinam
Maximum Size: m: 30cm f: 25-28cm
Sexual Dimorphism: Unclear. Males grow slightly
larger.
Mating System: Monogamy
Breeding Method: Larvophile mouthbrooder.
Important Update: After a little investigation by Tim Bardsley-Smith, Kevin Sorensen and Chris Davis the fish we have in Australia in this complex have been partially sorted out.
Some important clarifications:
1. There are no
Geophagus surinamensis
in Australia.
2. We have two commonly available types in
Australia, one is a varient of Geophagus
altifrons, though the location remains
unclear, the other is Geophagus
brachybranchus. For purposes of
identification black throated “surinamensis” are
G. brachybranchus, while the non-black throated
“surinamensis” are the aforementioned Geophagus altifrons. Recently, a number of
other varients eg: G. altifrons ‘Rio
Tocantins’ have become available. Australian
hobbyists need to take utmost care to avoid
mixing these fish and accidentally creating
hybrids.
