Tag Archives: tetra

Moenkhausia simulata

14. June 2019

We obtained a somewhat irritating import of a very rare species of tetra last week from Peru. In all probability, it is Moenkhausia simulata; however, our new import differs slightly from the previously known M. simulata in coloration. All other tetra species with a pattern of several horizontal stripes (Astyanax lineatus, A. kullanderi, A. superbus, Bario spp., Hollandichthys spp., Hyphessobrycon hexastichos, Markiana nigripinnis, Moenkhausia agnesae, M. latissima, M. rara, M. simulata and Pseudochalceus lineatus) either look completely different and/or have a completely different distribution area. Possibly, the fish imported by us is a scientifically undescribed, M. simulata very similar species.

The sex-difference is particularly interesting with this species. Our fish are currently 4-5 cm long and obviously sexually mature. The  adipose fin of the males is clearly bigger than that of the females and rusty-black with the dominant male in the aquarium. Among themselves, these tetra are quite robust. As large as possible, well structured aquariums and as large a number of specimens as possible ensure that the aggressive actions are not reflected in fin damage. Otherwise, the care requirements of the fish do not differ from those of other species that have been cared for in the aquarium for a long time, e.g. the Buenos Aires tetra (Hyphessobrycon anisitsi).

For our customers: the animals have code 269453 on our stocklist. Please note that we only supply wholesalers.

Text & photos: Frank Schäfer

Hyphessobrycon peruvianus

27. May 2019

Three species of tetra in northern South America are obviously close relatives to each other and often confused: Hyphessobrycon loretoensis from Peru, H. metae from Colombia, and H. peruvianus, again from Peru. From these, H. loretoensis has been portayed here: http://www.aquariumglaser.de/en/hyphessobrycon-loretoensis_de_1188.html.

Currently we were able to import the second Peruvian species once more, H. peruvianus, in wonderful, large specimens. It can be distinguished best from its close relative, H. loretoensis, by the coloration of the caudal fin. In H. peruvianus the black longitudinal band extends far in the caudal fin. Above and below it is often accompanied by red spots. The lobes of the caudal fin are hyaline. In H. loretoensis the black band ends shortly after the caudal fin origin. The caudal fin is completely red.

Regarding the aquarium maintanace there is no great difference between the two species, both are extremely beautiful fish that fit perfectly for any blackwater community tank.

For our customers: the fish have code 261453 on our stocklist. Please note that we exclusively supply the wholesale trade.

Lexicon: Hyphessobrycon: ancient Greek, means “small Brycon”. Brycon is another genus of tetras. peruvianus: means “originating from Peru”. loretoensis: after the Loreto province in Peru. metae: after the Rio Meta.

Text & Photos: Frank Schäfer

Moenkhausia heikoi

12. October 2018

For the first time we could import, even if only in very limited numbers, this tetra from the Rio Xingu described only in 2004. The animal became known in 2001, when Rainer Stawikowski presented the fish as “Hemigrammus sp. Xingu” in the journal DATZ. The scientific description took place in 2004, twice and almost simultaneously: by Géry and Zarske as Moenkhausia heikoi and by Lima and Zuanon as Astyanax dnophos. Since the work of Géry and Zarske appeared 5 days earlier, the name M. heikoi is valid.

This species is characterized by its large eye with a conspicuous light spot. The fish live in nature in cave-like structures between rocks in the rapids of the Xingu. Of course, they are very difficult to catch there, which is why they only appear very rarely on the market and at high prices.

For our customers: the fish have code 269513 on our stocklist. Please note that we only supply wholesalers.

Text & photos: Frank Schäfer

Jupiaba sp. „Cherry Spot“

29. August 2018

We were able to import a new species of tetra from Venezuela which does not resemble to any species known to us. According to the collector the animals were collected in small brooks in the surroundings of Puerto Inirida. There are no doubts that our new imports belong to the Astyanax relationship in the broadest sense, most probably to the genus Jupiaba. However, the diagnistic character of Jupiaba – elongated, sharp pelvic bones – are not visible in life fish. But our animals remind in respect of the shape of the body in J. pirana and in respect of the longitudinal band in J. antheroides. Unique in our fish is the black pigmented lateral line organ and the prominent caudal spot which is accompanied by two brillant red spots. Currently the fish are about 7 cm long, very lively and with a slight tendency to panic. The settlement of the animals is so far without any problems.

For our customers: the fish have code 209353 on our stocklist. Please note thta we exclusively supply the wholesale trade.

Text & photos: Frank Schäfer

Aphyocharax paraguayenis

22. August 2018

This small, about 4.5 cm maximum length reaching tetra belongs to the most attractive species of tetra at all. The species is very hardy and undemanding and can be easily bred in huge numbers. It is a fish of the subtropical regions and doesn´t even require a heater. In the wild, water temperatures between 16 and 30°C occur. However, one must keep in mind that temperature changes in nature usually take a lot of time.

Sadly the dawn tetra (this is one of the popular names applied to this fish by hobbyists) has one disadvantage: it sometimes bites of parts of fins and scales from other fish. It is still a mystery why this nasty behaviour sometimes appears. But probably, similar as in tiger barbs or flame tetras, the behaviour only appears when the school of dawn tetras is too small. Larger schools of 20 or more specimens have enough to do with conspecifics and usually leave other fish alone.

Another opportunity is to keep A. paraguayensis in a single species tank or only combined with some catfish. For example Corydoras hastatus lives in nature along with the dawn tetra in mixed schools. This is a fascinating look!

For our customers: the fish have code 206512 on our stocklist. Please note that we exclusively supply the wholesale trade.

Text & photos: Frank Schäfer

Pseudochalceus kyburzi

10. August 2018

After many years we finally were able again to import this very beautiful tetra from Colombia once more. This species attains usually a length of about 5 cm, the largest one reported had about 8 cm in length. In respect of the general look and the behaviour Pseudochalceus kyburzi can be best compared with the emperor tetras (Nematobrycon). By the way: the species name – kyburzi – was chosen to honour the discoverer of the emperor tetra, William A. Kyburz of Colombia, at the time a famous exporter of ornamental fish.

For our customers: the fish has code 283802 on our stocklist. Please note that we exclusively supply the wholesale trade.

Text & photos: Frank Schäfer

Hyphessobrycon piranga

11. June 2018

Currently we can offer exclusively some top-rarities among the tetra family, all German bred. One of them is Hyphessobrycon piranga, which was introduced in the hobby by Peter and Martin Hoffmann in the German magazine Datz (issue 11/2017) under the unusual name of „Hyphessobrycon sp. non-red devil“. Despite the fact that the new tetra has a lot of red colours it is obviously not identical with the probably still undescribed species that is known as „Red Devil“ in the hobby and that develops inter alia much larger fins. The „non-red devil“ was described officially in march 2018 under the name of Hyphessobrycon piranga. The new species occur from rivers in the upper rio Tapajós catchment. 

The males of the pretty species have red fins, while the females remind one a bit in black neons (H. herbertaxelrodi) or H. nigricinctus. In the wild the fish are mature at a size of about 2 cm standard length (without fins), but in the aquarium they will grow a bit larger. The photographed bred ones are about 3 cm long. The photo made by Peter Hoffmann shows a pair of the breeders.

This tetra is a beautiful, easy to keep and very lively fish.

For our customers: the fish have code 261552 on our stocklist. Please note that we exclusively supply the wholesale trade.

Text: Frank Schäfer, photos: Frank Schäfer & Peter Hoffmann

Exodon paradoxus

6. April 2018

For many aquaristis the Bucktooth tetra, Exodon paradoxus, is simply the most beautiful tetra from South America. The splendid fish glitter and glimmer like diamonds and they never stay still. They hunt and hit their conspecifics permanently and an uneducated watcher may become quite concerned that the fish will eventually hurt each other. But this doesn´t happen. In the wild, Exodon paradoxus feed almost exclusively on scales of other fish. Their highly specialized teeth enable that. Like a flash they attack their prey and the victim doesn´t understand what actually happened. The game of the Bucktooth tetras has two purposes. First: the game fools the potential victims and makes them „believe“ that the Bucktooth tetras are not interested in them. And second: for sure this permanent swimming is a perfect training for the small predators.

The species has a very wide distribution in South America. It can be found in Guyana and the whole Amazon and Orinoco basins. E. paradoxus attains a maximum length of about 7.5 cm. Keeping this fish is not complicated, but the tank should be large and the fish should be kept in a school as large as possible. Any type of usual fish food will be accepted readily. However, in respect of eventually planned tankmates one must be very careful. Best choice are catfish, for they have no scales at all and so they don´t fit the prey scheme of the Bucktooth tetras.

For our customers: the fish have code 253502 on our stocklist. Pleae note that we exclusively supply the wholesale trade.

Text & photos: Frank Schäfer

Hemigrammus levis Gold

7. March 2018

It is very difficult to determine gold tetras. The golden coloration is the skin reaction on a harmless infection with a parasite. If a tetra feeds the faeces of a fish-eating bird that contains the eggs of the parasite – a worm – in the intestine of the fish the eggs hatch and the larvae of the worm encapsulate in the muscle tissue of the fish. Their presence cause the production of the golden colour in the skin of the fish. Such a golden fish can be spotted much better than a normally coloured animal by a fish-preying bird.  The opportunity for the parasite to find the final host – the bird – grows. If such a golden fish is really eaten by a bird the encapsulated larvae become active again, grow to adult specimens, mate and produce eggs that leave the bird with its faeces. So the circle becomes closed. If the golden fish are not eaten they have no disadvantage against normally coloured conspecifics. This is prooved by decades of experience with golden tetras in the aquarium. The golden ones also become as old as normal tetras.

Initially only one species of golden tetra became known to science eg the the golden form of Hemigrammus rodwayi. As the true nature of this golden gloss was then unknown the fish were described as a species on their own, Hemigrammus armstrongi. The golden gloss covers a great number of pattern that is usually indispensable for determining a species. Today we know a great number of golden tetras belonging to a vast number of different species, although they usually appear only as single specimens in most species.

We obtained a good number of large, 4-5 cm long gold tetras from Brazil. Initially we were not able to identify the species. The shape of the body and the presence of small hooks on the anal fin of the males (which sometimes entangle in the meshs of a net) made it very likely that the species belongs to the genus Hemigrammus. When the light comes from behind, a golden line is visible that is runnung all over the body, similar as it is seen in the glowlight tetra, Hemigrammus erythrozonus. After some days of settlement the fish developed a pattern in the tail fin as it is known from the species Hemigrammus levis. However, most probably a number of species hides behind what is currently termed „Hemigrammus levis“ scientifically, but our capabilities to determine the fish more exactly are depleted now.

Hemigrammus levis becomes 4-5 cm long and is a peaceful schooling fish, comparable to the rummy nose tetra. So our new imports can be recommended as gorgeous inhabitans for community tanks with South American fish.

For our customers: the animals have code 256703 on our stocklist. Please note that we exclusively supply the wholesale trade.

Text & photos: Frank Schäfer

Distichodus lusosso

26. February 2018

The longsnout distichodus has a very wide distribution in the Congo basin. The species attains a length of up to 40 cm; we recently obtain extremly charming, small juveniles. D. lusosso is an omnivorous fish; a great part of the food is plant material, so a planting of the tank is usually not possible. One should keep D. lusosso either in larger groups (10 or more specimens) or solitary. If the longsnout distichodus is kept in too small groups the fish are usually very pugnacious against conspecifics.

For our customers: The fish have code 126002 on our stocklist. Please note that we exclusivekly supply the wholesale trade.

Text & photos: Frank Schäfer