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The Dwarf Pencil Fish, the Green Rivulus and the Hunchbacked Limia could be three freshwater fish in your tank. Find out about their behavior, what they look like, water conditions, how to feed them and how to breed them.

Dwarf Pencil Fish – Nannostomus marginatus (Family: Lebiasinidae)

Behavior:
It is a bit timid and likes its fellow dwarfs so its better to have few of them in your aquarium. They will grow to about 3 cms when adult and are slow swimmers so you will have plenty of time to admire them!.

Water and Tank Conditions:
This shy fish will need sheltered areas so make sure there is a well planted area and also a good amount of free space for it to swim around in. Ideally the water should be at about twenty four degrees Celcius.

Features and Colors:
It is not easy to tell the differences between the sexes. The males are thicker than the females and more brightly colored. The fish has three stripes running laterally along its flanks. Dark brown bands are located above and below the central gold one. The back is a golden brown with the body browny gray.

The fins are red around the perimeter and the bottom parts are also red. The Nannostomus genus has a unique characteristic in that its lateral bands change if they get frightened or at dusk. They change to stripes that slope instead.

Feeding:
This fish will eat a wide range of foods but due to its small mouth ensure the food size is sufficiently small.

Breeding Conditions:
Like the Croaking tetra the pencil fish does not readily breed. A shallow depth of slightly acidic water, about 12 cms, is needed for the breeding tank and a temperature of about 24 degrees centigrade. You will need two males to mate with one female and the use of a breeding trap.

Remove the fish once spawning has taken place. Deposited eggs will be found all over the place. It will be a couple of days before the fry hatch. Once hatched feed them infusoria initially followed by fine dry food and as they grow micro-worms, sieved daphnia and flaked foods.

Green Rivulus – Rivulus cylindraceus (Family: Cyprinodontidae)

Behavior:
The green rivulus is a hardy fish, peaceful and good at leaping so keep the cover on! It is is regarded as a bit of joker in the fish world due to its habit of taking up unusual positions and maintaining them for a while. It is best to keep these with fish around the same size.

Water and Tank Conditions:
With respect to plant requirements, have both floating and submerged plant types. For the water, an average temperature of about 22 degrees centigrade will be alright although it can tolerate a fairly wide range.

Features and Colors:
The green rivulus, as its name suggests, is olive-green with spots that are darker green. It also has reddish spots near the back end. This fish is also called the cuban rivulus.

This genus has many species all differing in color but their major characteristics and behavior remain unchanged. One specific characteristic they have is the presence of a spot found adjacent the top area of the peduncle fin and is referred to as a false eye.

Other species you will come across are the eye spot or ocellated rivulus (Rivulus ocellatus), the herring-bone rivulus (Rivulus strigatus), the yellow banded rivulus (Rivulus xanthonotus), the fire-tail rivulus (Rivulus milesi) and Hart’s rivulus (Rivulus harti).

Feeding:
You will notice how these fish become more a lot mmore lively when they are about to be fed. In general they are not fussy about the food they are given.

Breeding Conditions:
The difference between male and female is easy as the female has the large rivulus spot and is not as brightly colored compared to the male. A thickly planted breeding tank at 26 degrees centigrade is required with two females for each male.

They breed easily and once the eggs have been scattered about, take the plants and fertilized eggs to a separate incubation tank. The eggs will hatch after about two weeks and the fry can be fed for the first week on infusoria.

Hunchbacked Limia – Poecilia nigrofasciata (Family: Poeciliidae)

Behavior:
Also known as the Humpbacked limia and the Black-barred limia. These fish are peaceful and females can reach lengths of 6 cms or more. The Poecilia caudofasciata species is smaller and the male and female reach lengths of about 4 and 6 cms respectively.

Water and Tank Conditions:
twenty four degrees Celcius is adequate.

Features and Colors:
They are called hunchbacked because the young fish exhibit an arched back, which becomes greater as they age. The other parameter that also changes with age is the color. The younger are recognized by their olive color, dark vertical bands and yellow underneath.

The older fish has iridescent green spots on the bands, the stomach has a dark border, the dorsal fin is bigger with spines becoming black. Regarding color the male is a lot brighter than the female!

Feeding:
The main diet for the Hunchbacked limia is algae and other vegetable matter with the odd live meal thrown in (literally!).

Breeding Conditions:
The usual process for live-bearing fish can be applied but these fry are more difficult to raise and it will help if the breeding tank is in a position so that sunlight can fall on it.

Now you can have three additional freshwater fish to put in a tank and look after. Before you add more fish, ensure your aquarium can accommodate your newcomers.

What is Chihuahua? You must be feeling very much anxious to know the answer. Well, Chihuahuas are the smallest breed of dog in the world. Basically they can be categorized under ‘natural toy breed’. If you throw back your mind in history of the development of this breed then doubted the religious & mythical role of the Techichi in Toltec tribes. But the archaeologists argue that the remains of this breed were found in Mexico and in quite parts of U.S. In short, Chihuahua is a very small dog of a breed originating in Mexico, having pointed ears and a smooth coat.

Chihuahua is a sweet cute little dog with an apple-shaped head with an extraordinary tiny muzzle. It weighs about two to six pounds with height of six to nine inches. Generally Chihuahuas are found with dark glowing eyes. The color of eyes differs as the breed of this tiny dog changes. One peculiar feature of its eyes is that sometimes it sheds tears when Chihuahua shakes its head. Chihuahua’s ears are large and vertical at an angle of about 45 degree. It is said that they often uses their ears for emotions to express their feelings. The fragile physical features shows that how much delicate their body is. Chihuahua’s pretty features adorn more of its spongy longish tail. The graceful feet of Chihuahua is just amazing which makes you feel to cuddle and love more and more.

As Chihuahua is the smallest pretty dog in the world for they are known for. There is certain breed standards defined to this dog as per their dainty physical appearance in matter of size, colors, and coat. You will also find some non-standard size of Chihuahua. They are well popular by name defined as per their size like “Teacup”, “Pocket Size”, “Tiny Toy”, “Miniature”, “Mandy” and “Standard”. These names are been suggested in reference by Chihuahua club of America and the American Kennel Club. This two clubs classify two types of Chihuahua namely the Long-haired and the Short-haired Chihuahua.

Chihuahua is devoted only to be maintained in specific weather climate. The most preferably is cold climate for them to survive. Because of unique and smallest cute breed of dog Chihuahua is always seen maintained in an affectionate surrounding. With proper training and socialization it becomes pretty easy for them to adapt easily in a tranquil environment. The soft love for Chihuahua never ends as the innocent face is always in front of you. One unique trait in most of Chihuahuas is the tendency to “burrow” into blankets or clothing in order to sleep.

Thus, Chihuahuas has gained much of fame mostly by love and affectionate persons. Chihuahua puppies run well in demand in the market. If you got completely obsessed by this tiny dog then just need not to wait to buy such a beautiful and nice-looking dog like Chihuahua!