Four Fish Eye / Four Eyed Fish (Anableps anableps)

Four Eyed Fish (Anableps anableps) is a fish of the family Anableps that have unique eyes. They are scattered in the Earth Central and South America from Venezuela through Guyana, Suriname, French Guiana and Brazil ended in Amazon delta. Fish livebarrier this group has an unusual appearance of the eyes.

Although dubbed the four-eyed but actually they only have two eyes. Two eyes are extraordinarily adaptable to support survival. Eyelets fitted with a network of eye pigment ribbon horizontally divided into two parts. This makes the fish while floating on the water surface can look both ways at the same time the bottom of the eye can be seen in the water and the top of the eye can be seen above the water. Band network is also divided into two pupil pupil pupil in the water and on the water, this is what makes this dujuluki four-eyed fish. Both pupils connected with the named iris. With this ability of fish to adapt to look up in the air and in the water simultaneously. The lens will change its thickness from top to bottom when viewing objects in the air and water. These cross-sectional images Anableps eyes anableps

TAXONOMY

Kingdom      :  Animalia 

Phylum         : Chordata
Class            :  Actinopterygii 

Order           :  Cyprinodontiformes
Family          :  Anablepidae 

Genus          :   Anableps 

Species        :  Anableps anableps

 
As the inhabitants of the water, four-eyed fish is a fish that is very agile. This fish is also commonly found in brackish waters with plenty of mangrove vegetation. Silver gold fish body with a white stripe in the middle of his body, while the plain white belly. Body of adult fish can reach more than 20 cm where the female body size is usually larger on average about 26 cm while males about 20 cm. Four eyed fish are carnivorous with a main diet is insects that are in the water and small crabs. In addition to insects, they also eat invertebrates and small fish. For commercial food, fish can be dried or frozen foods such as brineshrimpe, artemia, earthworms and bloodworm. The thing to remember is to avoid sinking fish food into the water because the fish will not chase.

Description:
1. Retina underwater
2. lens
3. Pupil underwater
4. network bands
5. slice
6. Pupil bawar water
7. retina air
8. optic nerve

Four eyed fish are used to living in groups in the wild with over half a dozen members. Maintenance under six tails make fishing easier and nervous stress. In groups, male and female fish is hard to distinguish when I was younger but after the adult female fish are usually much larger than the males. These fish reproduce viviparous and usually fewer problems arise when many groups together when breeding. The males have a prominent genitals gonopodium and is different to that of the other livebarrier family. while the female genitals are covered with the skin of the so-called foricula. Gonopodium male fish has a different orientation for each individual as well as foricula females.  

This means that males have to right orientation suitable for berkompulasi with female oriented to the left and vice versa. However, some sources say that the male gonopodium flexible enough so that the possibility of a few degrees can berkompulasi males with each female. The process of fertilization occurs internally with gonopodium as a tool for female penetration. Females will be pregnant for about 12 weeks followed by an increased appetite dramatically. They give birth females will be more aggressive and attack the other tankmate. Female fish will then try to find a suitable place to give birth to her babies.  

The number of babies born fetus sanpai range 13 20 head is not much else livebarrier family. Baby fish usually measuring about 4-5cm long and instantly be able to eat pellets or granules. For the case of a baby born prematurely usually fish will become infected and to prevent it can be done by moving them to a separate tank containing sterile water.

For maintenance in the aquarium is not too difficult. One thing that is important is the cleanliness of the water must be maintained, the filtration process must be strong enough to remove the ammonia yield inedible leftovers. Tank size 120cm x 45cm x 30cm is quite ideal because the fish are not so comfortable with a large tank. As the fish that inhabit the surface of the water, the water level high enough 80% of the tank because it was feared the fish would jump if the tank is full.  

Decorative tank with sand substrate that is thick with branches or roots of mangrove wood. Shallow or rocky substrate can be provided to shelter young fish or fish for adults who want to rest and eat. Aquatic plants are not so necessary, but if you want to try the hard leaved plants can be used as Microsorum pteropus or Anubias spp. As the tropical fish then the water temperature should be maintained at 25-31 ° C with a pH level of 7.5 to 9 and hardness 15-35 oH. Four eyed fish are peaceable, but not suitable when mixed with small fish because it would be considered a food.  

Tankmate that fit like some kind livebarrier and basic fish species such as gobies Stigmatogobius sadanundio. Several other surface fish like Toxotes spp and Scatophagus not natural competitors in its natural habitat.