The Australian northern trout gudgeon (Mogurnda mogurnda) belongs to the very few fishes of the fifth continent, which became native already before the 2nd world war in the aquaria. They are very beautifully colored animals, which in contrast to many other gobies are also relatively easy to breed.
Unfortunately, the animals are only of limited suitability for socialization, because they can be extremely quarrelsome with incorrectly selected tankmates. And so the species gradually disappeared. But some breeders and exporters remained faithful to the beautiful species and we are glad to have them once again in the stock.
The species designation is not completely certain, because there are several similar species and even specialized scientists cannot determine the species without performing genetic tests and/or without knowing the exact area of origin.
Mogurnda are free-swimming gobies and therefore do not form their territories on the bottom, as many other gobies do, but throughout the water column. The tank must be arranged rich in hiding places, so that conspecifics do not have to see each other constantly. Rainbowfish, large danios or barbs, but also robust tetras are suitable as tankmates.
Northern trout gudgeons are carnivores, plant material is ignored. Spawning is not done in caves, but on wood, stones, broad-leaved plants etc., the male guards the spawn. The sexes are most reliably distinguished by the genital papilla (males flat and acuminate, females thickened and fringed at the end), but head shape also provides good clues. Males develop a distinct humped head.
Water can be soft or hard, pH should be around neutral, temperature between 22 and 28°C. The maximum length is given with 17 cm, usually the animals reach around 10 cm, they are ready to spawn already with 6 cm length.
For our customers: the animals have code 436402 on our stocklist. Please note that we supply exclusively to wholesalers.
Text & Photos: Frank Schäfer