Alternative name Melanorivulus faucireticulatus.

Rivulus faucireticulatus was described by the Brasilian scientist W.J.E.M. Costa at the end of the year 2007. This Rivulus faucireticulatus was collected in the Bonfim river floodplains, upper Claro drainage, upper Paraná river basin, central Brazil. (see maps)

It differs from all other species of the subgenus Rivulus in having a broad sub-basal red stripe on the dorsal fin in males, ventral portion of the head with a black reticulate color pattern in females, and caudal fin orange on the dorsal and ventral portions, and yellow on the middle in females. Rivulus pinima and R. vittatus, also endemic to the Claro river drainage, are redescribed, and data on their type localities are discussed. (source: Killi Data Online, Dec, 2007.)

No detailes yet but is believed not to be different from other species within the Melanorivulus subgenus. So, keeping and breeding is easy but a good cover of the aquarium is necessary because there ability to jump, even true the smallest opening, is unbelievable.

This species can, if there is enough space for them, housed in a tank with more males than one only and several females. If separated before and brought together again however, they can be very agressive to each other and fight to become dominant to others. The best way to have much offspring is to put a pair or an trio in a small tank from 10 liters with a small filter in it or with some airation. On the bottom some peat moss or dark gravel and a floating "mop" to give space for laying there eggs. The fish will, if they become a rich varity of life food, spawn during there whole adult life and produce daily between 5 to 15 eggs.

The eggs should be collected by hand and stored for about 14 days in a small container. Eggs are 1.6 mm and amber colored. It is wise, to add to the water you store the eggs in, some acryflavine to provent fungus coming up.

After hatching the young fry can eat fresh artemia nauplii without any problem. It takes 4 to 5 months to raise them to maturity. Often the number of males is far above the number of females. For some species this can become a major problem for the breeder as he has to raise many young fishes and so become able to distribute a few pairs to other hobbyists. Recent personal tests laerned that lower pH levels during the time of hatching gave a higher percentage of females. To achieve this I use some peat moss that I add to the container with the egss just before they are ready to hatch. This peat moss also is a good way to prevent eggs to become attact by fungusses.

There lifespan can be up to 3 years in captivity.

Remarks :

Max. reported SL 29,8 mm.
Dorsal 9-10,
Anal 13-14,
LL scale count (average) 29-31
Pre- dorsal length to % SL – 75.8 %
Depth to % SL – 24 %