Posts tagged Goldfish
Goldfish Diversity – The Many Forms of a Single Species, Carassius auratus
May 4th
With the wide range of body shapes and colors, it is hard to believe that all of the fish we call “goldfish” come from the same ancestor, a rather dull, silver/brown carp known as Carassius auratus. Almost two thousand years ago, Asian fisherman raised these fish in ponds for food, and soon the natural orange and yellow mutations of these fish caught the eye of Chinese royalty. Over time, the fish that we know as “goldfish” were selectively bred for specific traits and colors which would eventually become the varieties we see in fish stores today. Let me introduce you to some of the most popular “breeds” that have become aquarium mainstays over the past few hundred years.
Made for Outdoor Living
Comets – Perhaps the closest in appearance to the “natural” carp, Comets have longer fins than the common goldfish, and are often sold as “feeder fish”. They can be orange, white, silver, yellow or black. They get fairly large and are often sold for ponds rather than aquariums. The Sarasa Comet is a very popular variety whose coloration is a combination of pure white and deep red. More >
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Loading ...Aquarium Fish Growth Myths
Aug 24th
Eileen here. Some myths and legends are universal. Almost every country has some version of a “bigfoot” legend. Nessie is one of Scotland’s biggest celebrities. People are abducted by aliens and UFO’s are spotted in the sky around the world. What does the aquarium hobby contribute to this list?
“Fish only grow to the size of their aquarium.”
Like most of those other stories, this one likely started because people saw some truth behind it. They saw their fish grow large in relation to their aquarium, stop growing, then die. But, just like we now know that the Earth is not flat and we will not fall off the edge of it if we sail too far, we now know that the size of an aquarium does not dictate the size of a healthy adult fish.
The most common victim of this theory is the comet goldfish, the fish often sold as very inexpensive feeder fish or won in carnival ping-pong ball toss games. People win the fish or buy them as inexpensive pets, not knowing that the tiny fish they took home should be able to become an 8-10 inch adult with a lifespan of 10 years or more if well cared for. “Goldfish bowls” are sold almost everywhere that carries fish supplies. Small aquariums – 10 gallons or under – are often sold with pictures of small fancy goldfish on the box so it is no wonder that people may be unaware of the problems they are walking into.
Keeping any animal, fish or otherwise, in a habitat that is too small for it causes a number of problems that might not be obvious at first. The fish people win at carnivals or purchase as small juveniles might be fine for a short time in a small aquarium, but as the fish grows, so does its requirements. Looking at the same situation in terms of a person instead of a fish, it becomes more obvious. An infant, for example, doesn’t require much space for his needs to be met. He can feed and exercise within the area of his nursery and regular cleanings can keep his nursery healthy. But, as the infant grows into a toddler, his needs also grow. He requires more space to exercise so his muscles develop properly. He is growing and needs more food and so produces more waste as a result that the same regular cleanings the infant received cannot control. As he grows through his life, that boy can certainly grow into a man if never let out of the nursery that he was kept in as an infant, but that man will not be as healthy as he could be. His hygiene and development will have suffered from being kept in a confined space and not allowed to flourish and develop properly and he will probably not live as long as a man whose environment has been allowed to grow with him.
The same happens when a fish is kept in a small tank. As the body of the fish grows, so does the amount of waste it produces and the food it needs. This can affect the water quality of the aquarium and lead to disease caused by high ammonia levels, high nitrite levels, low dissolved oxygen content, low pH and other incorrect parameters. Just as a person kept in a small space cannot grow properly, the fish would also physically not be able to grow to its full size. Its body and skeletal structure may be stunted by the lack of space and ability to exercise and swim as it should, but the internal organs often continue to grow at a normal rate. The internal damage this causes, in combination with water quality issues, will lead to a premature death.
While a small tank can certainly affect the size of the fish, it is not the way that we once believed. There is no internal sensor in a fish that can detect the size of its environment and adjust its growth accordingly. The fish we keep are just as dependent upon us as small children to give them the proper care needed to keep them healthy so it is up to us to be aware of what their needs are and to do our best to make sure those needs are met throughout the fish’s life.
(+3 rating, 5 votes) Loading ...Carnival Fish Part 1
May 15th
Carnival Fish Part 1: Goldfish
It is the time of year when carnivals and fairs pop up across the land, with games and rides and fun for all (well the kids anyway). What that brings to mind here at TFP are all the unsuspecting parents who have suddenly become the proud new owners of a pet fish that their kids have won as prizes in these games, and need to know how to take care of them. Every year we sell thousands of fish to carnivals as game prizes, and then find many people who need help with their new “prizes” after they get them home.
Goldfish and Betta fish are the most commonly found in these games, so this carnival fish blog will give some basic information about the care of these fish. Part 1 will be about goldfish information and care.
The practice of keeping goldfish (Carassius auratus) dates back to as early as 970A.D. when domesticated fish keeping began in ancient China. Farmers would impound carp as food fish, these carp where silver grey fish, like the wild carp found today. A genetic mutation in some of the carp gave them a yellowish gold color. The farmers would then selectively breed these colored carp, over time this selective breeding lead to what we now know as the modern goldfish. As the popularity of these fish grew, and they spread out from China, selective breeding of various mutations in the species has given rise to many different types of goldfish over the centuries. These different types of goldfish include the Oranda, Ryukin, Shubunkin, Comet, Lion head, Bubble eye and more. Goldfish are seen as good luck symbols in many oriental cultures and some breeds even have religious roots; the Celestial Eye goldfish were bred because monks believed their eyes looked towards the heavens.
Goldfish are peaceful fish that do well with other breeds of goldfish or other cold water fish. There are little to no issues with aggression, aside from the odd individual or “nippier” variety. It is not recommended to mix goldfish with tropical fish (tetras, guppies, etc) due to differences in water quality and temperature preferences. Goldfish prefer aquarium water temperatures from 60 – 74 degrees. Goldfish are commonly kept in outdoor ponds that will reach freezing temperatures in winter, provided it can not freeze solid, and a floating heater is used to insure constant gas exchange. Goldfish will tolerate a wide range of pH values, from 6.0 to 8.0, so long as conditions are stable.
Most types of goldfish will reach a maximum length of 6”- 8”, Comet and Shubunkin Goldfish can reach 12” or more. Goldfish can live up to 20 years given a proper diet and water conditions; there have been recorded accounts of goldfish living into their 40’s
Goldfish are easy to feed as the will accept virtually any types of fish food. Flakes or pellet formulas especially for goldfish are best. Avoid meaty foods, goldfish have a high vegetable requirement. Vegetable matter like algae sheets, cucumbers, or peas can be supplemented into the goldfish’s diet to help maintain optimal health.
Goldfish tend to be messy fish, with a big appetite, which leads to large amounts of waste. As a result monitoring goldfish’s water conditions is very important. It is not recommended to keep goldfish in unfiltered bowls, although it is possible if frequent (usually bi-weekly) water changes are consistently done and the water remains aerated. Live plants can be used, although they will usually end up eaten as the fish get bigger. The best environment for goldfish is an under stocked aquarium with ample filtration and regular maintenance.
I hope that this has helped all you new goldfish owners out there, or even peaked the interest of anyone that is considering keeping goldfish.
Until next blog
Dave
(No Ratings Yet) Loading ...Uncommon Facts About Common Aquarium Fish
Apr 15th
I’d like to take time to welcome Frank Indiviglio to That Fish Blog. Frank is a former Bronx Zoo Zoologist, author and conservationist who’s worked with everything from fish to elephants. He’ll share his unique insights and work with various species on here, as well as the newly created That Reptile Blog & That Avian Blog. Welcome Frank!
Today I would like to pass along some interesting facts concerning fish you may be familiar with. I’ll focus mostly on aquarium trade species, with a few others added for good measure. I’ll add to the list in future articles. Enjoy, and please share your own store of unusual facts with us.
Finding a mate in the dark, featureless expanses of the deep sea poses quite a difficulty. Male benthic anglerfishes, such as Ceratias uranoscopus and related species, solve this dilemma by biting onto the first female they encounter. Thereafter, the male’s internal organs degenerate and he remains fused, by his mouth, to the female – surviving on nutrients circulating in her blood and periodically releasing sperm to fertilize her eggs!
Unique among the world’s fishes, male sticklebacks (small fishes of the family Gasterosteidae that inhabit marine, brackish and fresh waters), use kidney secretions to glue plant materials together when constructing their enclosed, bird-like nests. This behavior, along with their zealous protection of the eggs, helped spur the development of the aquarium hobby in Europe in the 1700s.
Cichlids found in Africa’s Lake Malawi are among the most enthusiastic of nest builders. Although measuring but 6 inches in length, males of one species create circular sand mounds that can exceed 3 feet in diameter, while another excavates 10 foot wide pits. Up to 50,000 such structures may be constructed in the same general area by a displaying group, or “lek” of males.
Marine damselfish, such as Stegastes nigricans, are unique in practicing a form of underwater “farming”. Pairs form territories around beds of marine algae (“seaweed”) and drive off fishes, shrimp, crabs and other creatures that show interest in this favored food.
Clownfish, such as the commonly kept percula clownfish, Amphiprion percula (or its cousin, the false percula, A. ocellaris, of “Nemo” fame) live unharmed among the tentacles of sea anemones — marine invertebrates that sting and consume other similarly-sized fishes. Anemone tentacles respond with a sting upon contact with any alien body, but are prevented from stinging themselves by chemicals in the mucous that they secrete. The clownfish, it seems, produces the same chemical in its own mucous and hence is not recognized as food.
Fishes lack external ears but do have inner ears that pick up the water pressure changes which accompany sounds. Aided by the Webarian Apparatus, an organ that connects the
inner ear to pressure-sensitive gas in the swim bladder, species such as carp and goldfish hear quite well and can communicate through vocalizations (perhaps it is not so odd to talk to your pet after all!).
Among the animals that are kept by people for their fighting abilities, none are as small as brackish-water fishes known as wrestling halfbeaks, Dermogenys pusilla. These thin, 3 inch-long warriors are the subject of staged matches in betting parlors throughout Thailand and Malaysia. Fights rarely result in injury, except to the wallets of losing bettors!
Despite popular belief, koi, Cyprinus carpio and goldfish, Carassius auratus, are not closely related. Goldfish, the first of any fish to be domesticated, were first kept by the Chinese over 2,000 years ago. Koi (the word means “carp” in the Japanese language) originated in the Black Sea area and arrived in Japan as a food source. They were first bred for domestic traits in Nigata, in northeastern Japan, in the 1820’s.
Ichthyologists discover new facts about fish on a near-daily basis. You can read articles about their findings at:
http://sciencedailey.com/
Thanks Frank,
Until Next Time,
Dave
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