he last time ScotCat
visited the Plotoside family for a factsheet was way back in March
2009 with a look at Porochilus
rendahli "Rendahl's catfish".
This month of April 2013 takes us back again
to this family and a look at the "Short Finned Catfish"
If you looked back at the P. rendahli
factsheet you would be forgiven in thinking that this is the same
fish as N. brevidorsalis but as mentioned in
that factsheet the eye is much closer to the mouth in the Porochilus
genus and also larger as can be seen in the bottom two images.
the smaller eye in normal position relating to the snout.
rendahli with the larger eye being
closer to the mouth.
occurs in lakes, swamps and rivers, including
turbid backwaters and clear, flowing tributaries. Inhabits bottom
of warm, clear, flowing streams; also lives in billabongs and
flooded lagoons. Feeds on insects, prawns, mollusks and small
crayfish and reaches sexual maturity at about 12 centimeters.
In the aquarium they tend to be less inclined
to like company as they get older, and are very much a digger.
Better suited to larger tanks of 4ft (120cm) or over
with rocks and plants provided for cover. This genera are easily
spooked in the aquarium. Best kept in small groups of 4-6 individuals.
The pectoral and dorsal spines, as is the norm in this genera,
are venomous so handle with care.
This species is uncommon in Australia as it is found only in the
far north at the tip of the Cape York peninsula in Queensland
(see map) in the tributaries of the Jardine River and in McDonnel
Creek (Jackson River system). It is more widespread in southern
New Guinea. The specimens pictured here were captured in Papua
New Guinea (Timika). In its natural habitat they feed on aquatic
and terrestrial insects, mollusc, shrimps and prawns.
Dorsal spines (total): 1; Dorsal soft rays
(total): 4-5; Anal spines: 0; Anal soft rays: 56 - 93.
Dark brown to grey overall, sometimes almost
black or mottled, and white underneath.
Generally peaceful with other placid species.
As yet unknown.
There are no proven
external sexual differences, but females are probably more
robust in the body.
Tablet and pellet foods, also frozen shrimp
and worms but they do relish prawns.
Neo means "new" in latin and "silurus"
From 'silouros', a kind of river fish. Silurus,
sheetfish, catfish. According to Lacepéde
(1803) this word indicates the rapidity with which Silurus
can move its tail.
brevidorsalis: With short dorsal
S.H. Midgley and M. Allen, 2002. Field guide to
the freshwater fishes of Australia. Western Australian Museum,
Perth, Western Australia. 394 p.
Froese, R. and D. Pauly. Editors. 2011.
FishBase. World Wide Web electronic publication. www.fishbase.org,
fin: The primary
rayed fin(s) on top of the body.
Anal fin: The fin
forward from the anal cavity.
© Allan James @