Aquariums welcome a part of nature into our homes that we may never otherwise see. Shaping these sunken communes, though, can come with a hefty price tag. After spending a fair bit of money on a tank, lighting, filtrations and corals, you're still missing the best part — the fish! While all you may need is an imagination to concoct a fish tank, there is a lot to consider when it comes to a fish's value and compatibility with your tank's other aquatic life. Saltwater fish tend to be more expensive than freshwater fish because of their beauty, size and the risk involved in catching them. While a Yellow Tang would certainly brighten up any tank, an Orange Tail Fiji Puffer is half the price and more interacti
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Public aquarists have long known that big arapaima and arowana become "flighty" at night. It is probable that all we are seeing with this syndrome is mechanical damage from smacking into the tank walls or lids. The same thing may be the cause of the "daffy duck" syndrome in big Pimelodid catfish (where their bills get bent up, down or askew). It all has to do with a combination of tank size, fish mass, instigating factor and if the tank has clear sides or not. Small fish don't have the body mass to hit the wall with enough speed to cause droop-eye. Large fish kept in overly small tanks might not have enough running room to get up enough speed to cause damage. Big fish in big tanks can reach enough speed to die outright from hitting the tank sides at night (this has been shown in subsequent necropsy of young adult Arapaima) There is then the idea that some of the fish in the "middle" have just the right combination of body mass and "running room", and get damaged when they hit thetank side, and their eyes droop as a result. In mild cases, one eye droops, in severe cases, or in cases of multiple impacts, both eyes are affected. Many people have reported that when kept in ponds or pond-like tanks, the problem is not seen. The theory is that these fish can more naturally navigate in ponds and streams, and can better avoid "hitting the wall".
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The Tennessee Aquarium is home to a richly diverse collection of the world's most fascinating aquatic species. Among the thousands of fish within River Journey, visitors meet prehistoric-looking arapaima, bizarre paddlefish, strange sea dragons and fanciful seahorses. Along with nature's oddities are some beautiful darters, colorful cichlids, giant whiptail rays, enormous catfish and ghost-white gar. Sink beneath the saltwater waves within Ocean Journey to come face to face with big, toothy sharks, colorful reef fish, graceful rays and curious porcupine fish. Before or after exploring the naturalistic exhibits at the Aquarium, dive into this page to learn more about some of the Aquarium's most asked about fish species.
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