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Jardini Arowana
3 likes Arowana
(Scleropages jardini) Expert Aggressive 24" 180 gallons 76-85° F, pH 6.0-7.0, KH 2-4 Carnivore Australia, New Guinea Osteoglossidae Arowana Cichlid-New-World Indigenous to the Jardine and Adelaide Rivers of northern Australia, Jardini Arowana can be found from still billabongs to flowing streams. They are large, highly evolved, powerful predators and can be traced back millions of years without many changes (earning them the title, "living fossil"). Jardini Arowana are also known as Gulf Saratoga, and like their South American cousins, they are sometimes referred to as "water-monkeys" due to their unique predatory behavior where they will hide, stalk, and jump out of the water to ambush insects and small animals that are just passing by or hanging out on an overhanging branch or nearby vegetation. The Jardini Arowana is usually not too hard to obtain from local fish stores, but are harder to find than their Silver Arowana cousins. Although they are considered to be more elusive in the wild, they are becoming more popular in the hobby due to captive breeding programs. Jardini Arowana are a very fun fish to keep and can offer a lot of enjoyment for the advanced to expert hobbyist. They are constantly on the move, swimming around the aquarium (just under the surface) with plenty of activity. They are a true "bony tongue" species that is long and flat, with large eyes (offering them great hunting accuracy), a dark, silver-gray, stream-lined body with seven rows of large scales that tend to have pink to orange hued edges, and fins that are a darker, metallic coloration with various pink to orange spotting. As evolved predators, Silver Arowana have large, oblique mouths lined with small, sharp teeth rooted in their oral bones which include their jaws, tongue, pharynx and palate; they also possess forked barbels on the tip of their bottom jaw used for sensing disturbances on the water surface. Males have a longer anal fin and can be distinguished by their prognathous jaws, where females are usually thicker when fully mature. Jardini Arowana require an aquarium of at least 180 gallons with a sand or gravel substrate and should also be provided with driftwood (tannins in the driftwood will help maintain a lower pH) and vegetation; it's a good idea to have some free-floating plants or plants that will adhere to driftwood as some individuals do not tolerate rooted vegetation. They will also require a secure, enclosed top on their aquarium as they are powerful and notorious jumpers. Weekly 15-25% water changes should be carried out (frequency can vary depending on aquarium filtration efficiency) as Jardini Arowana are very sensitive to water chemistry. Although they can be easily bullied by larger Cichlids when they are young, once Jardini Arowana hit the 8 to 12 inch mark, they usually become extremely aggressive to all other tank inhabitants, especially those of a similar shape; tank mates should be chosen very carefully. Jardini Arowana are a solitary, aggressive, territorial species, but have, on occasion, been known to coexist with large Oscars, large Manguense, large, predatory catfish, and large plecos, but it's hit or miss and more often than not, they are eventually the only fish left in the aquarium. The Osteoglossidae family arguably contains the hardiest freshwater fish species', which don't often get sick, although they grow to be large and become messy eaters and can eventually develop health problems if their water chemistry is not properly maintained. Jardini Arowana are carnivores and should be provided with a variety of meaty and vitamin enriched foods such as live, frozen or freeze-dried ghost shrimp, krill, minnows, bloodworms, blackworms, mealworms, earthworms, crickets, frogs, crayfish, and Cichlid/Arowana pellets or sticks. Jardini Arowana are mouth brooding, egg-layers and aquarium breeding is extremely difficult, but not impossible (a large tank of 600+ gallons would be needed). In the wild, spawning commences at the start of the wet season, where they will pair off and lay their eggs (50-200). Once fertilized, the female will keep the eggs in her mouth until they hatch. When the fry hatch they will stay with their mother for around 4-5 weeks and threatened the mother will open her mouth allowing the young to seek shelter.
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Cao Nguyen
Khris DeCapua
Silver Arowana
2 likes Arowana
(Osteoglossum bicirrhosum) Expert Aggressive 40" 240 gallons 78-85° F, pH 4.5-6.8, KH 2-4 Carnivore Amazon Basin, South America Osteoglossidae Arowana Cichlid-New-World Native to both black and white water floodplains of the Amazon drainage basin in South America, the Silver Arowana can usually be found thriving in still to calm, acidic waters with plenty of vegetation. They are large, highly evolved, powerful predators and can be traced back over 150 million years without many changes (earning them the title, "living fossil"). Silver Arowana are also referred to as the "water-monkey", due to their unique predatory behavior; in addition to preying on smaller fish and invertebrates in the water, they will hide, stalk, and jump out of the water to ambush insects, birds, frogs, and small animals and amphibians that happen to be passing by or resting on an overhanging branch or nearby vegetation (adults can leap as high as 6 feet into the air). Silver Arowana are available at most fish stores and are extremely popular with the more experienced to expert hobbyists due to their "fossil" status, beautiful and unique appearance, swimming habits, and the fact that they are a true "bony tongue" species (not to mention their massive adult size and rapid growth rate). They are a long, flat, ray-finned (Actinopterygii) species with large eyes (offering them great hunting accuracy), a silvery, stream-lined body with large scales (can have pink and greenish hues), and beautiful, tapered fins that can have a pinkish hue. As evolved predators, Silver Arowana have large, oblique mouths lined with small teeth rooted in their oral bones which include their jaws, tongue, pharynx and palate; they also possess forked barbels on the tip of their bottom jaw used for sensing disturbances on the water surface. This amazing species can also obtain oxygen from air by drawing it into their swim bladder, which is lined with capillaries similar to those found in lung tissue. They are an exciting species that are constantly swimming around the aquarium, providing plenty of action and enjoyment (and they can live for 20 years!). Silver Arowana require an aquarium of at least 240 gallons (300+ gallons with at least 30 inches in width is recommended) and should be provided with a sand or gravel substrate along with driftwood (the tannins in the driftwood will keep the pH lower to help simulate blackwater conditions) and vegetation. They will also require a secure, enclosed top (weighted down depending on the size of the specimen) on their aquarium as they are powerful and notorious jumpers. Partial water changes of approximately 25% (RO water is recommended) should be carried out every week; however, more or less frequent water changes may be required depending on the overall aquarium filtration efficiency. Silver Arowana are not bullies or very aggressive, but as adults they can sometimes be aggressive towards their own species; they will eat any live fish they can fit in their massive jaws (although they tend to refrain from eating plecos) and tank mates should be considered accordingly. They have been known to do very will with Lima Shovelnose catfish, large Oscars and other large South American species, but can be harassed by large Pike Cichlids if the aquarium doesn't provide enough space. The Osteoglossidae family arguably contains the hardiest freshwater fish species' once past the juvenile stage (their first few months), which don't often get sick, although they grow to be very large and become big and messy eaters and can eventually develop health problems if their water chemistry is not properly maintained. Silver Arowana are carnivores and are not picky; they should be provided with a variety of meaty and vitamin enriched foods such as live, frozen or freeze-dried ghost shrimp, krill, minnows, bloodworms, blackworms, mealworms, earthworms, crickets, frogs, crayfish, and Cichlid/Arowana pellets or sticks. Floating foods are mainly recommended to prevent "drop-eye" (believed to be caused by a combination of fatty food and specimens constantly looking down for their food), which seems to be the most common ailment of Silver Arowana. Although breeding is extremely rare in captivity (reported in 1000+ gallon tanks with simulated seasonal conditions), Silver Arowana are brood caring, egg-layers; at the beginning of the flood season, they will pair up and build a circular nest in the mud of the floodplains where the female will lay a small amount of eggs. Once fertilized, the male will store and protect the eggs/fry in his mouth until the juveniles yolk sacs have been fully absorbed (around 2 months).
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Khris DeCapua
Black Arowana
1 like Arowana
(Osteoglossum ferreirai) Expert Aggressive 40" 240 gallons 75-85° F, pH 4.5-6.8, KH 2-4 Carnivore Rio Negro Basin, South America Osteoglossidae Arowana Cichlid-New-World Black Arowana are native to both black and white water floodplains of the Amazon drainage basin (Rio Negro) in South America and can usually be found thriving in still to calm, acidic waters with plenty of vegetation. They are very similar to the Silver Arowana aside from coloration, attitude, a very high resistance to "drop-eye", and that they are a slimmer fish in relation to body depth (it's also believed that they can survive a colder temperature threshold than Silver Arowana). They are large, highly evolved, powerful predators and can be traced back over 150 million years without many changes (earning them the title, "living fossil"). Black Arowana are also referred to as the "water-monkey", due to their unique predatory behavior; in addition to preying on smaller fish and invertebrates in the water, they will hide, stalk, and jump out of the water to ambush insects, birds, frogs, and small animals and amphibians that happen to be passing by or resting on an overhanging branch or nearby vegetation (adults can leap as high as 6 feet). Black Arowana can often be found via online fish stores and private sellers, although they are harder to find at local fish stores than their Silver Arowana cousins and may have to be special ordered. Black Arowana are extremely popular with the more experienced to expert hobbyists due to their "fossil" status, beautiful and unique appearance, swimming habits, and the fact that they are a true "bony tongue" species (not to mention their massive adult size and rapid growth rate). They are a long, flat, ray-finned (Actinopterygii) species with large eyes (offering them great hunting accuracy), a silvery, stream-lined body with large scales, and beautiful, tapered fins that fade from silvery to dark bluish-black with white to pale pinkish to orange edges. As evolved predators, Black Arowana have large, oblique mouths lined with small teeth rooted in their oral bones which include their jaws, tongue, pharynx and palate; they also possess forked barbels on the tip of their bottom jaw used for sensing disturbances on the water surface. This amazing species can also obtain oxygen from air by drawing it into their swim bladder, which is lined with capillaries similar to those found in lung tissue. They are an exciting species that are constantly swimming around the aquarium, providing plenty of action and enjoyment (and they can live for 20 years!). Black Arowana require an aquarium of at least 240 gallons (300+ gallons with at least 30 inches in width is recommended) and should be provided with a sand or gravel substrate along with driftwood (the tannins in the driftwood will keep the pH lower to help simulate blackwater conditions) and vegetation. They will also require an enclosed top (weighted down depending on the size of the specimen) on their aquarium as they are powerful and notorious jumpers. 25% water changes (RO water is recommended) should be carried out every 2 weeks (more or less frequently, depending on aquarium filtration efficiency). Black Arowana aren't overly aggressive (although they will hold their own and occasionally chase off other larger fish species), but can become very aggressive towards their own species. They will eat any live fish they can fit in their massive jaws (although they tend to refrain from eating plecos) and tank mates should be considered accordingly. They have been known to do very will with Lima Shovelnose catfish, large Oscars and other large South American species. The Osteoglossidae family arguably contains the hardiest freshwater fish species' once past the juvenile stage (their first few months), which don't often get sick, although they grow to be very large and become big and messy eaters and can eventually develop health problems if their water chemistry is not properly maintained. Black Arowana are carnivores and are not picky; they should be provided with a variety of meaty and vitamin enriched foods such as live, frozen or freeze-dried ghost shrimp, krill, minnows, bloodworms, blackworms, mealworms, earthworms, crickets, frogs, crayfish, and Cichlid/Arowana pellets or sticks. Although breeding is extremely rare in captivity (reported in 1000+ gallon tanks with simulated seasonal conditions), Black Arowana are brood caring, egg-layers; at the beginning of the flood season, they will pair up and build a circular nest in the mud of the floodplains where the female will lay a small amount of eggs. Once fertilized, the male will store and protect the eggs/fry in his mouth until the juveniles yolk sacs have been fully absorbed (around 2 months).
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