How can Guppies Help Stop the Spread of Zika Virus

Zika Virus

 The Guppy can control Mosquito Larvae and stop Zika virus

How to Stop the Zika Virus Naturally and Without Chemicals, Just use Guppies!

We are in a time of growing worldwide concern over the spread of the Zika Virus, a real threat to public safety. So far the only proven way the virus can be spread is through the bite of several types of mosquitoes.  What can be done naturally to slow this threat? The meager guppy has been used worldwide to eat the larvae of mosquitoes and control the spread of viruses like Malaria and Yellow Fever. Let’s dig a little deeper into this potential solution.

All of the known virus carrier mosquito species are prolific breeders in most tropical and subtropical climates around the world. You may not be aware that they are also prolific breeders in temperate climates around the world in spring and summer as well.

A near panic is starting in the US and shows signs of getting bigger, as fears of mosquitoes that will spread the Zika Virus increase closer to mosquito bite season. It is the Guppy that can help stop the spread of the mosquito, by eating their eggs and larvae before they mature into stinging biting full grown mosquitoes.

The Guppy can control Mosquito Larvae and stop Zika virus


In an article for it was explained fully how the Guppy can help stop mosquito born viruses worldwide. The article has listed the 2 species, (Aedes aegypti and Aedes albopictus) which are dominant in the Florida Everglades and will spread throughout much of Eastern and Central United States as soon as the average water temperature reaches above 70F. This happens when daytime temp is about 85F and night time temperature is no lower than 65F, so typically in late March – June in most areas.

The basic idea for this outbreak is the same as the Reich method has been to control mosquitoes for many years. You have read blogs on this site, on Florida Pond Management and by Dr. Reich for years promoting the use of guppies to control mosquitoes in backyard ponds and still pools of water.

The Guppy can controule Mosquito Larvae and stop Zika virus

Dr. Thomas R. Reich stated in a recent interview with “I am very surprised the government has not put out advisories to use the Guppy method. It is true that  Florida based mosquitoes do not yet have the agent that spreads the virus, but that can start the second one infected person is bitten. You see it only takes one mosquito to bite and draw blood from an infected human.  That blood, which is used to feed her developing eggs, gives the larvae that hatch out of those eggs the agent that causes the Zika Virus in humans. As of now there are 18 active cases of humans with Zika Virus in Florida.”

Dr. Reich continued “Just as it has happened for centuries with Yellow fever and Malaria, once the agent of the virus is in the strain of mosquitoes, the tendency is for the mosquito to carry the agent is within the DNA of the subsequent generations of the mosquitoes without further contact with infected humans.   With a new generation every 3-5 days this happens quickly. Each sting or bite of a mosquito with the agent of the virus within it can potentially infect the human host.”

The Guppy can controule Mosquito Larvae and stop Zika virus

There is a simple solution to keep your property and surrounding area safe from mosquitoes, their eggs and their larvae. You can do it without using harmful chemicals that may negatively affect the environment, damage other wildlife and leach into the water supply.  The answer to the problem is simple, the Guppy. The most popular aquarium tropical fish of all time may again be the answer to controlling the Zika virus and it is the least expensive fish in your neighborhood store right now!

You simply need to get 3-5 females and put them in each open stagnant or still body of water around your home area. It could be a bird bath, an old ditch full of water or a Goldfish pond.  Remember that Goldfish are vegetarians and do not and will not eat mosquito larvae nor the guppies.  The Guppy will eat its weight in mosquito larvae and mosquito eggs every day, and each female will have up to 80 fry (baby guppies) every 4 weeks.

The Guppy can controule Mosquito Larvae and stop Zika virus

What’s even better, when you buy the pregnant females they will have a packet of sperm from a male that re-impregnates her 4-6 times without the need of a male. This is because in its native environment the Guppy lives in flood plains and gets washed from puddle to puddle, and may never see a male again. However as the babies mature there will be males and females to continue the process.

The Guppy is known as the Millions Fish because the young grow so fast, they can actually be impregnated at 4 weeks old and begin to produce more young of their own. Therefore at the end of 6 months a good size pond of water can be pretty well populated and well able to take care of mosquito larvae potentially infected with the Zika Virus agent pretty quickly.

The Guppy can contol Mosquito Larvae and stop Zika virus

In Brazil, the government is using the Guppy to kill the larvae if the mosquitoes that carie the Zika Virus right now:

“BRAZIL (Reuters) – They look harmless enough, but these guppies are the latest weapon in Brazil’s all out war on the Zika virus.

The fish feed off the larvae of the Aedes mosquitos that transmit Zika, and officials are using them to help stop the disease from spreading.

Rio de Janeiro municipal health worker Fabio Freitas says the guppies are being deployed in stagnant pools and hard to reach areas. “The advantage of using the fish is that there is a large area that we are unable to treat, and the fish take care of the larva,” he said.”….  READ MORE


Did you know that Yellow fever and Malaria were all but brought under control in central and North America by use of this prolific little fish, the Guppy? Did you know that its continued use today in certain areas of India and Africa are controlling Yellow fever by controlling or nearly eliminating the mosquito populations of many areas?

The Guppy is responsible for making much of Florida ready to be populated in the 1800’s and early 1900’s, and for Flagler’s railroad to be able to be built. Most major and many minor lakes in Florida today are full of guppies, mollies and other small tropicals to this day.  Now, the Zika Virus will be controlled in great measure by the mighty and helpful little fish in the majority of Florida’s larger and medium size lakes already by the presence of this amazing little fish.


Here is a story of success happening in India with the Guppy project going on right now:

The Guppy can control Mosquito Larvae and stop Zika virus

In Mangalore, a port city in southwest India, school children and volunteers hope to curb the occurrence of the disease of malaria via the Guppy movement, a campaign that aims to control malaria by using a rather peculiar but natural means of eliminating mosquitoes using guppies.

The Guppy, a freshwater fish popularly kept in aquariums, eats mosquito larvae and eggs and thus helps reduce the spread of malaria as the disease is caused by the parasite Plasmodium, which is transmitted to humans through mosquito bites. As a means to control mosquitoes, the guppies are left in stagnant water puddles where mosquitoes breed. The fish then eat the mosquito eggs and larvae, leading to reduced mosquito population.

Nripendra Kumar Sarma from the public health engineering department said that bio-control helped Assam significantly reduce its malaria cases. “Till 2012, we had over 30,000 cases each year. But now they are no more than 3,000-4,000, in areas where the Guppies were introduced. This approach can very well be initiated in areas (of the country) that are prone to malaria, dengue and Zika, all of which are mosquito-borne diseases,” Nripendra Kumar Sarma said.

The Guppy can control Mosquito Larvae and stop Zika virus

ONE LAST NOTE: When you hear about invasive species, remember they aren’t all bad.  The Guppy is one of the most famous of all invasive species.  Once, the Guppy was native only to Trinidad and possible parts of Eastern South America (though they were probably brought there by man from Trinidad).  The Guppy is now native to every continent on earth.  The Guppy is not only in most every aquarium store around the world in countless varieties, shapes, sizes and colors, but the Guppy populates most tropical and subtropical region lakes and streams as well, doing what they do so well, eating their weight in mosquito larvae!  Now again we call on the resilient little fish to help man with the Zika Virus!

For more information check out our Twitter, FaceBook and Pinterest and feel free to ask questions by clicking here.  If you encounter problems, come back to and I will do my best to help your aquarium thrive.  I love fish and I want you to grow with the hobby.  I want you to have all the information at your fingertips to create a happy healthy aquarium community for you and your family.

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Tropical Aquarium Fish Halfbeak: A Fun Aquatic Fish for the Home Aquarium



Halfbeak fish as explained by Dr. Thomas R. Reich


The Half-beak or Dermogenys/Belonsox



Halfbeak Fish as explained by Dr. Thomas R. Reich

Two very strange live-bearing fishes that are sometimes kept in an aquarium are Dermogenys and Belonesox.  The family Hemiramphidae (Half-beaks) is common throughout tropical seas, but Dermogenys pusillus inhabit the brackish rivers of Malay, Siam and the Dutch East Indies.  These unusual fish can be kept and bred in a fresh-water aquarium, especially if a little salt (a teaspoon per gallon) is added.

The lower jaw is fantastically prolonged: if both jaws were the same length the fish would appear to have a long beak; as it is, it only has “half-a-beak”, thus the common name.  The halfbeak is a superb fighter, the second in ability only to the fighting fish itself.  The people of

Thailand have, for many years bred halfbeaks for fighting, until the present cultivated strain far outperforms its wild counterpart.

Halfbeak Fish as explained by Dr. Thomas R. Reich

Fights are staged in this way:  Two halfbeaks are placed in a shallow earthenware bowl, filled with a few inches of water.  The fish eye each other for a moment and then close in for the attack.  They may lock jaws and shake and roll over.  Or one fish may clamp its large jaws over the other fish’s head.  Obviously, the fish that grabs the other has a temporary advantage.  Such “wrestling” sometimes continues for hours, until one of the combatants becomes too exhausted to continue.  The one who gives up is the loser, and the men who have placed their bets on this fish lose as well.  Occasionally, both contestants become exhausted at the same time.  That is, the fish administering the most holds during the fight scores the larger number of points and is declared the winner!


Halfbeak Fish as explained by Dr. Thomas R. Reich

In Southeast Asia and the East Indies, where the halfbeak is native, it is a valuable eater of mosquito larvae.  If the quiet streams, ditches and ponds where the halfbeak lives were without this fish, the mosquito population would become unbearably large.

Halfbeaks make interesting aquarium pets, and they ordinarily do not fight with other kinds of fishes their own size.  However smaller fishes are likely to be eaten quickly!

Halfbeak Fish as explained by Dr. Thomas R. Reich





Halfbeak Fish as explained by Dr. Thomas R. Reich

The Halfbeak is not at all a beautiful creature to have about the house, nor is it an easy fish to breed in captivity, but there is a certain fascination in watching anything as weird as this.  The adult male is about three inches long and the female, who is considerably larger, produces young in litters varying from one to thirty at a time, which are anywhere from 1/4 of an inch to over and inch at birth!  The babies grow rapidly, especially if there are plenty of live plants for them to tear up and devour, and begin to develop the half –beak when they are about four weeks old.  The tank must be thickly planted so that the babies can hide  in the green water-grass before their parents can eat them.

halfbeak giving birth halfbeak 8

Halfbeak Fish as explained by Dr. Thomas R. Reich

Since the males, when two or more are together, will fight, sometimes to sever harm or death, it is best to keep only one male with several females for breeding purposes.  The females are easily recognized by their fan shaped anal fin.  For a successful brood, the pregnant female must be left undisturbed; in favorable conditions, not in a room with traffic, but away in a private corner.  The female may bred every 4 to 8 weeks.  Before she gives birth, put brown paper around the bottom half of the tank or the babies may swim into the glass not seeing it and damage their prominent jaw.  This problem can be avoided by using aquatic plants to form the borders or confines of the tank.



Halfbeak Fish as explained by Dr. Thomas R. Reich

To keep these fish it is necessary to have a constant supply of live food for them such as guppies or tadpoles.  Without constant live food of substantial size, they will quickly die.  Many breeders keep a tank of these unusual fish around the breeding room to dispose of their “cull” or less than ideal fish in this manor.  Many fish fans hate to use live fish as food, but true aquarists and breeders know that this is only a part of nature.

Halfbeak Fish as explained by Dr. Thomas R. Reich


Dr Thomas R Reich PhD

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Posted in Fresh Water Tropical Fish, Unusaul Aquarium Fish

Giant Danio – Danio Balabaricus

breeding the giant danil with Dr Thomas R. Reich

breeding the giant danil with Dr Thomas R. Reich

Danio Balabaricus –  Giant Danio

By:  Dr. Thomas R. Reich PhD


General Information on Giant Danio

The Giant Danio or Danio Balabaricus belongs to the family Cyprinidae and was first imported in 1909. breeding the giant danil with Dr Thomas R. ReichAs its name   suggests, this is the largest of the Danios; it used to be known under the scientific name of Danio Malabaricus. The Giant Danios originates from southwestern parts of India and Sri Lanka.  It is pale blue in color with three or four pale yellow stripes or blotches   running down the sides of its body. The dominant individuals in a group of these fish will be the dominate male, and this fish should be selected for breeding.

Further, the body is slim, elongated, strongly compressed at the sides, and up to 4 inches   long. The back is steel-blue, the flanks greenish, behind the gills there are two to three   transverse golden bars, and the sides are decorated with blue and goldfish longitudinal   stripes. The male is usually smaller and has more distinctive coloring.  In the spawning   season he has orange pectoral fin.

breeding the giant danil with Dr Thomas R. Reich

In its natural surroundings in India, it is quite common and lives in clear, stagnant and running waters along the Malabar Coast, and grows up to 8 inches in length, but that would be an exceptional specimen even in a large stream. Tank raised specimens will rarely grow larger than 4 inches. The mouth has two sets of barbells, although captive specimens are usually missing the barbells on the upper jaw.

In spite of its large measurements, this fish can be kept with other, smaller species. An extremely peaceful fellow, it is very tolerant of other fishes in its environment. It very  much appreciates a little morning sunlight in its tank!


Sexing a Breeding Pair of Giant Danio

breeding the giant danil with Dr Thomas R. Reich

The sexes are easy to tell apart by the slimmer, more attractive appearance of the male, and the “stuffed” belly of the female. This Danio is known for its incredible speed,   noticeably faster than that of other species. It is practically impossible to remove this fish from a well planted community tank without creating a great deal of disorder, unless you take its flight direction into account and capture it between the net and the receiving jar or second net.


The Breeding Process of the Giant Danio

breeding the giant danil with Dr Thomas R. Reich

The breeders, 1 female and 2 females should be conditioned on live food and kept   separately for 7 to 10 days. Set up the breeding tank (at least 10 gallons, though 15 or 20   long is ideal) the same as with Zebra Danios, with the marble bottom, however, the water   depth needs to be 8 inches, and you must add several nice clumps of fine leaved plants.   The manner of fertilizing the eggs is characteristic of other Danios, and a steady   temperature of 75F t0 79F is great. However, during mating, the male pushes himself   against the female and brings his anal fin, which he has rolled up into a kink of a bag,   under the female’s anus.

breeding the giant danil with Dr Thomas R. Reich

The eggs are caught in this “bag” and are fertilized at once.   The male then scatters the fertilized eggs among the plants. The number of eggs per   meeting is small – only 5 to 20, but this process is repeated many times over about a 2   hour period and a total of 200 to as many as 400 eggs are produced fertilized and laid.

breeding the giant danil with Dr Thomas R. Reich

The eggs are clear as glass, not adhesive, so most will fall through the plants into the   marble base and be fully protected from the breeders. The eggs measure about 1mm in   diameter, much larger than the Zebra and its other close relatives. Once the breeders   activities have stopped remove the breeders at once.

breeding the giant danil with Dr Thomas R. Reich

After two days after the eggs have been laid, the first young fish appear. Depending on   various factors, however, it can take as long as a week before the last egg has hatched   out. Temperature is not the least of these factors.


Just How Hardy are the Giant Danio Fry

I once had an interesting experience with a group of Danio’s I was breeding (a trio of   Long fin Blue Leopard Danios). I set up the breeding tank in the usual way, and after a   day or so, I was convinced the fish had not bred. I thought, since they were a very fancy   strain, something had gone wrong and that they had failed to breed. I returned the   breeders to the conditioning tanks, and dumped the water in the tank, setting outside in   the cold, about 41F at night for a day, then brought the tank back in to prepare it for   breeding again, this time Fire Neons.

breeding the giant danil with Dr Thomas R. Reich

I decieded not to sterilize the marbles on the   bottom and to just fill the tank with fresh aged water. On the evening of the second day,   the tank was filled with the aged water, and readied for breeding. The temperature was   raised to 75F for breeding the Fire Neons and the breeders introduced the evening of the   fourth day. The next morning, when I was observing the behavior of the pair of Fire   Neons, I observed hundreds of slivers hanging from the glass sides of the tank. Not knowing what was actually going on I removed the Fire Neons. I did not know if the fry   were fast hatching Neons or what? I decided to raise the fry and as the days passed other fry appeared.

breeding the giant danil with Dr Thomas R. Reich

I raised the young and both the Blue Longfined Leopard Danios and Fire Neons grew up   happy and healthy together! This shows that the fry of the Bracydanio and Danios   species are much heartier than anyone could have expected, left with nothing but the   slightest amount of moisture for over 24 hours and exposed to temperatures as low as   41F, the eggs survived and hatched with no ill effects. Further, that the fry learn to   survive in adversity, even when combined at birth with other species!

breeding the giant danil with Dr Thomas R. Reich


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