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Max Size: 20cm

Borneo Red Fin Silver Shark (Cyclocheilichthys janthochir)

The Borneo Red Fin Shark is a stunning, peaceful, timid shoaling species that is not often available in the aquarium trade. You can maintain these fish in either a decent-sized aquarium on their own or in a group of six to eight individuals in an appropriately sized community aquarium alongside other peaceful fish.

Ideal tankmates for the Borneo Red Fin Shark could include medium-sized, peaceful species that enjoy the same soft, acidic conditions. Other Cyprinids, as well as Loaches, larger Rasboras, and Danios, all make suitable candidates. However, it would be better if you did not house these fish with any boisterous or aggressive fish that would intimidate them; otherwise, they will go into hiding and not feed.

Borneo Red Fin Sharks will thrive in an aquarium with a soft sandy substrate, plenty of driftwood, and areas of dense vegetation where they can retreat if they feel frightened. However, it would be best to avoid placing sharp decor in your aquarium as this can cause them injury when they decide to make a dash for shelter. Floating plants are also beneficial as they will reduce the light in the aquarium. In addition, these fish will appreciate ample swimming space along the front of the aquarium.

Borneo Red Fin Sharks are intolerant to the build-up of organic waste and constantly require pristine water to thrive; therefore, you should never introduce them to a biologically immature aquarium. In addition, the aquarium will need a decent level of oxygenation and powerful filtration; to keep nitrate to a minimum, and you will need to perform frequent partial water changes.

It would be best to place the aquarium in a quiet location as these are very skittish fish and are easily spooked. Lastly, you should provide them with shaded hiding spots and tight-fitting lids to prevent them from accidentally jumping out.

The Borneo Red Fin Shark has a silvery torpedo-shaped body, and its dorsal and caudal fins are a reddish-orange colour edged in a dark greyish-black. Their pectoral, pelvic and anal fins are transparent, and they display a thin black stripe that runs from the nose to the base of their caudal fin.

Tank Mates

3 ideal tank mate ideas for the Borneo Red Fin Silver Shark include:

Chocolate Gourami(Sphaerichthys osphromenoides)
Denison Barb(Sahyadria denisonii)
Mascara Barb(Dawkinsia Assimilis)
Quick Facts
Scientific NameCyclocheilichthys janthochir
Year Described1854
Other NamesBorneo Red Fin Silver Shark, Burmese Red Fin Silver Shark, Janthochir Barb
ClassificationActinopterygii
OrderCypriniformes
FamilyCyprinidae
GenusCyclocheilichthys
OriginsIndonesia
TemperamentPeaceful
Aquarium LevelBottom - Middle
DifficultyBeginner - Intermediate
ShoalingYes
Best kept asGroups 6+
DietOmnivore
ReproductionEgg-Layer
Lifespan4 - 5 years
Water Parameters
Water TypeFreshwater
PH4.0 - 7.0
GH1 - 12
TDS18 - 179
Temperature
71 - 80℉
21.7 - 26.7℃

Photos

Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark
Borneo Red Fin Silver Shark

Videos

Borneo Red Fin Silver Shark Cyclocheilichthys janthochir - Rare Barb Fish Profile & Care Guide

Natural Habitat

The Borneo Red Fin Shark is endemic to the Kapus River, which is located in West and Central Kalimantan in Borneo, Indonesia, in Southeast Asia. These fish inhabit blackwater rivers and streams and old peat swamps.

The water in their natural habitat is typically stained brown due to the release of tannins and other chemicals caused by decomposing organic material. The substrate is usually scattered with twigs, fallen leaves, and branches. Such environments characteristically contain very soft acidic water and are often shaded due to the forest canopy above.

These biotopes are threatened in the wild because of building developments, rubber and palm oil plantations and other human actions.

Such environments characteristically contain very soft acidic water and are often shaded due to the forest canopy above. Across much of Southeast Asia, these biotopes are under threat from building developments, rubber or palm oil plantations and other human actions.

Feeding

Borneo Red Fin Sharks are not particularly fussy in the home aquarium and will happily accept good quality dried foods such as flakes, granules and pellets. However, to optimize their best colours and condition, you should also offer them frequent meals of live and frozen foods such as mosquito larvae, bloodworm, daphnia, Mysis shrimp and artemia. More significant individuals will eat krill and finely chopped prawns.

Sexual Dimorphism

It is somewhat tricky to differentiate between the male and female Borneo Red Fin Shark. However, it is believed that sexually mature females are likely to be thicker-bodied and slightly less colourful than males.

Breeding

Currently, there have been no successful recordings of Borneo Red Fin Sharks being bred in the home aquarium.

Frquently asked questions

Are Janthochir Barbs good community fish?

Janthochir Bars are Generally peaceful and make excellent residents of the more extensive, well-furnished community setup. However, because of their size and the fact that they are fast-moving, they could stress out smaller, slower-moving timid tankmates.

There are lots of suitable tankmates for these Barbs, including many Cyprinids, Cichlids, Catfish, Loaches, and Characins; still, proper research is essential when selecting a compatible community of fish. A community based around one of their native river basins or countries would also present a worthwhile project with some attractive alternatives.

How do you tell the difference between male and female Janthochir Barbs?

It is somewhat challenging to distinguish male from female Janthochir Barbs. However, sexually mature females are likely to be slightly duller and thicker bodied than males.

What aquarium setup is best for my Janthochir Barbs?

When it comes to Janthochire Barbs, the decor is not as crucial as the water quality and the volume of open swimming spaces provided. It would be better if you kept these Barbs in a large, well-furnished aquarium or a setup designed to recreate a peat swamp-type environment with dim lighting, branches, roots and leaf litter.

Like various species that come from such pristine natural backgrounds, they are intolerant to the accumulation of organic wastes and requires clean water at all times to thrive. Therefore, it would be best if you never introduced them to a biologically immature aquarium. The best water parameters for Janthochir Barbs is a temperature between 71 and 80 degrees Fahrenheit, a pH level of between 4 and 7 and a water hardness that ranges between 18 and 179 ppm.

What do Janthochir Barbs look like?

Janthochir Barbs have a torpedo-shaped silver body. Their caudal and dorsal fins are reddish-orange and edged in a dark grey to black colouring. Their pectoral, pelvic and anal fins are transparent, and they display a thin black stripe that runs from their nose to the base of their caudal fin.

What should I feed my Janthochir Barbs?

In captivity, Janthochir Barbs are easily fed. However, to develop these fish's best colours and condition, you should offer them regular meals of live and frozen fares such as daphnia, bloodworm, and brine shrimp alongside good quality dried flakes and granules. More significant individuals especially enjoy chopped prawn and shrimp.

Where do Janthochir Barbs originate?

Janthochir Barbs are endemic to the island of Borneo in Southeast Asia, where they are known from the Indonesian provinces of Kalimantan Barat and Kalimantan Tengah. These Barbs inhabit blackwater streams and rivers correlated with ancient forest peat swamps. The water is usually stained brown from the release of tannins and other chemicals discharged by decomposing organic matter. The substrate is typically scattered with fallen leaves, branches and twigs.

Other Barbs of interest

African Banded Barb(Barbus fasciolatus)
Arulius Barb(Dawkinsia arulius, Puntius arulius)
Black Ruby Barb(Pethia nigrofasciata)
Blue Spotted Hill Trout(Barilius bakeri)
Butterfly Barb(Barbus hulstaerti)
Checker Barb(Oliotius oligolepis)
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Date Added: 14/10/2020 - Updated: 27/05/2022 12:43:38