Tag Archives: tile

Gymnothorax tile

11. December 2020

For many years the up to 60 cm long moray eel species Gymnothorax tile has been sold as “freshwater moray”. It is true that G. tile can live in pure fresh water for a while (a few months) without showing any discomfort. But practice shows that this moray eel species is much more persistent in brackish or sea water (15-30 grams of salt per liter), as known from other fish species of the tidal zone, such as Scats, Monos etc. When keeping the fish in fresh water, the pH-value should not drop below 8, otherwise the moray eels will stop eating.

They are predatory fish that feed exclusively on carnivorous food: small fish, crabs and shrimps form their natural food. In the aquarium Frutti di Mare are an ideal substitute, frozen smelts and shrimps should be used as addition. It may take several weeks before these morays accept food. This is normal and not a cause for concern. The best thing is to put some live food fish in the aquarium; once they have disappeared, the spell is broken, the moray eel is accustomed and from now on it becomes a greedy eater. You have to watch your fingers a little bit; the moray eels see badly and orientate themselves by their sense of smell. If the keeper’s fingers still smell of food, it can happen that the moray eel bites him. This is not poisonous, but it bleeds violently and is in danger of infection.

Gymnothorax tile is very tolerant against conspecifics, as well as other large fish. The water temperature can be between 22 and 30°C. As with all brackish and saltwater fish the oxygen demand is high. The species is distributed along large parts of the coasts of the Indian Ocean.

For our customers: the animals have code 419675 on our stocklist. Please note that we only supply the wholesale trade.

Text & photos: Frank Schäfer

Gymnothorax polyuranodon

22. September 2017

This is the only real freshwater species of moray: Gymnothorax polyuranodon. Usually this species is not found over 30-40 km away from the coast, but most often in pure freshwater. The other salt tolerant species of moray, for example Gymnothorax tile, usually do not leave the tidal zone.

We could import this only very rarely available species (despite its wide distribution in the indo-west pacific region) now from Indonesia. Our 10 specimens are juveniles, 20-25 cm long. Maximum length reported for this species is about 150 cm. Each single specimen has an individual pattern of spots.

In the aquarium these morays are very anxious during settlement. So they should be kept along only with absolutely peaceful and calm fish. For feeding one should place some live small feeder fish of about guppy size in the moray tank. When these feeder fish are vanished the morays have started feeding. However, the keeper has to be patient. Often enough this takes several days to weeks. The fasting is usually harmless for the morays.

Breeding appears only in the sea – like in all species of moray. This is the reason why the species is so far spread, as the eggs and the larvae are taken away with the currents. In respect of keeping morays in the aquarium one has to take care that the tanks is absolutely closely covered. Morays will find even the smallest gap and press their body through – often with a fatal consequence. Besides this the pH is important: it should never be on the acidic side, but always over 7.5, better over 8.

For our customers: the fish have code 419654 on our stocklist. Please note that we exclusively supply the wholesale trade. Available in small numbers only!

Text & photos: Frank Schäfer