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The neon tetra Paracheirodon innesi is a freshwater fish of the characin family family Characidae of order Characiformes. The type species of its genus, it is native to blackwater and clearwater streams in the Orinoco and Amazon basin of South America.

The neon tetra is found in the western and northern Amazon basin in southeastern Colombiaeastern Peruand western Brazil. The neon tetra has a light-blue back over a silver-white abdomen.

The fish is characterized by an iridescent blue horizontal stripe along each side of the fish from its nose to the base of the adipose finand an iridescent red stripe that begins at the middle of the body and extends posteriorly to the base of the caudal fin. Rarely, they develop a dark olive-green sheen lining on their backs. The fish is partially transparent including fins except for these markings.

Neon tetra – Wikipedia

During the night, the blue and red become gray or black as the fish rests—it reactivates once it becomes active in the morning. Sexual dimorphism is slight, with the female having a slightly larger belly, and a bent iridescent stripe rather than the male’s straight stripe.

They have recently become available in a long-fin variety.

Ttetra neon tetra was first imported from South America and was described by renowned ichthyologist Dr. Myers inand named after Dr. During a single month, an average of 1.

Neon tetras reach 3. However, they will die if traumatized by dramatic changes to their environments. They tend to be terta and, because of their small size, should not be kept with large or aggressive fish which may bully or simply eat them. Fish that mix well in an aquarium are guppiesother types of tetras, such as the rummy-nose tetraikkan tetraand glowlight tetraand other community fish that live well in an ideal tetra water condition.

Mid-level feeders, they are best kept in schools of six or more, for the shoaling effect when they move around the tank. They shoal naturally in the wild and are thus more brightly colored and more active when kept as a shoal as opposed to singly. The color and the iridescent stripe of this fish may become dim at night, and can be virtually invisible after a period of darkness. The color may also fade during a period of stress, such as human intervention into the tank.


Neon tetras are omnivores and will accept most flake foodsif sufficiently small, but should also have some small foods such as brine shrimpdaphniafreeze-dried bloodwormstubifexwhich can be stuck to the side of the aquarium, and micropellet food to supplement their diets. A tropical sinking ijan is ideal, as most brands of these include natural color enhancers that bring out the color in neon tetras.

Some frozen foods, including frozen blood worms, add variety to their diets. The male is slender, and the blue line is straighter. The female is rounder, producing a bent blue line. Some aquarists say the females look plumper when viewed from above. However, the straightness of the line and the plumpness of the female might occasionally be due to the eggs she is carrying. A neon tetra can appear slightly plump in the belly due to having overeaten. To breed neon tetras, hobbyists place a pair of the species in a breeding tank without any light, and gradually increase the lighting until reproduction occurs.

Other inducers include mosquito larvae and a hardness of less than 4 dGH. Everything placed in the aquarium is sterilized, as is the aquarium top. Because the adults, and other fishes if a breeding tank is not used, will often eat newly hatched fryit is common to remove the eggs as soon as they have been laid. The eggs terra especially sensitive to light, and hatch a rink a dink dink within 24 hours of the laying.

Fry can be fed infusoriaespecially tstra and egg yolk for one to four weeks, followed by nauplii of brine shrimpshaved cattle liver, and formulated diets. Fry achieve their adult coloration at about one month of age.

Adults can spawn every two weeks. Neon tetras are occasionally afflicted by the so-called “neon tetra disease” NTD or pleistophora disease, a sporozoan disease caused by Pleistophora hyphessobryconis.

Despite being a well-known condition, it is generally incurable and often fatal to the fish. However this disease is also generally preventable. The disease is most likely passed by newly acquired fish, which have not been quarantined. Symptoms include restlessness, loss of coloration, lumps on the body as cysts develop, difficulty swimming, curved spines as the disease progresses, and secondary infections, such as fin rot and bloating.


A so-called ” false neon disease “, which is bacterial, shows very similar symptoms. It is impossible for the home aquarist to determine for certain the difference between NTD and false NTD on the basis of visible symptoms alone, without laboratory backup.

This disease has also been confused with columnaris mouth rot, mouth fungus, ‘flex’. Generally the best ‘treatment’ is the immediate removal of diseased fish to preserve the remaining fish, although some occasional successful treatments have been performed that include fish baths and a “medication cocktail”.

The use of a diatom filterwhich can reduce the number of free parasites in the water, may help. As with Pleistophora neon tetra disease, prevention is most important and this disease is rare when good preventative measures are performed. The green neon tetra P. The cardinal tetra P. The name Hyphessobrycon innesi is an obsolete synonym for P. From Wikipedia, the free encyclopedia.

Neon tetra Scientific classification Kingdom: This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. January Learn how and when to remove this template message. This section contains instructions, advice, or how-to content. The purpose of Wikipedia is to present facts, not to train. Please help improve this article either by rewriting the how-to content or by moving it to WikiversityWikibooks or Wikivoyage.

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Neon tetra

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