Reticulated Cory (Corydoras reticulatus)
Family: Callichthyidae, Subfamily Corydoradinae
Common Name: Reticulated Cory
Origin and Habitat: Lower Amazon River basin, Brazil.
Compatibility/Temperament: Very peaceful bottom fish, well suited to any community aquarium of non-aggressive fishes. Must be kept in a group of five or more; a group of three can be kept if combined with other cory species.
Reticulated Cory Diet
In its habit it feeds on worms, crustaceans, insect larvae. Readily accepts prepared foods that sink such as tablet and pellet; frozen bloodworms and live worms are relished as treats.
Attains 2.4 inches.
Minimum Tank Suggestion
24 inches in length.
Water parameters for Reticulated Cory
Soft (hardness up to 12 dGH) acidic to very slightly basic (pH to 7.2) water, temperature 22-26C/72-79F.
This attractive species may be seen under other common names such as Network Cory and Mosaic Cory, both references to the reticulated patterning that is distinctive and often variable from fish to fish as evidenced in the accompanying photos. The underlying silvery colouration has a lovely greenish metallic sheen depending upon how the light strikes the fish. It shares the reticulated patterning with another species, Corydoras sodalis, and the two can easily be distinguished by the dorsal fin; the subject species has a large black blotch, whereas the dorsal in C. sodalis is barred but has no blotch.
The aquarium should be well-planted with pieces of bogwood, a dark substrate (small gravel or sand, provided it is smooth-edged) with some open areas, and have subdued lighting which may be partly achieved with floating plants; most cory species do not appreciate bright lighting, and this one very much prefers the shaded cover of plants and wood. Females are rounder when viewed from above.
The Corydoras are quite sensitive to water parameters and quality, and highly intolerant of salt, chemicals and medications. Signs of stress usually begin with rapid respiration, then lethargy (often just "sitting" on plant leaves, wood or the substrate respirating heavily, sometimes near the surface) and sometimes rolling onto one side. At such signs, a partial water change of at least 50% with a good water conditioner should immediately be made, and appropriate steps taken to remove the cause. Any sudden fluctuation in water chemistry or temperature often induces shock, causing the fish to "faint" and fall over on its side. Corydoras introduced to new aquaria will settle in better if the tank is established; corys do not adjust well to a new aquarium with still-unstable water conditions and fluctuations.
The dorsal, pectoral and adipose fins are each preceded by a spine which is actually a hardened and modified ray; the pectoral fin spine can be "locked" into position by the fish; care must be taken when netting corys not to entangle these spines, which can also give the aquarist a nasty jab. They are believed to be a defense adaptation, to lodge the fish in the throat of a predator.
All species in the genus will periodically and fairly regularly swim quickly to the surface for a gulp of air. The fish swallows the air and blood vessels in the hind gut extract oxygen from the air; it is then expelled through the vent the next time the fish breaks the surface for another gulp of air. This adaptation is believed to have evolved so that the fish can survive in poorly-oxygenated water such as drying pools during the dry season. It is however essential to the fish's well-being that it regularly swallows air.
This species was described by A. Fraser-Bruner in 1938 and the Latin species epithet means netted or net-like, a reference to the network or reticulated patterning. The name of the genus, which was erected by B.G.E. Lacepede in 1803, is derived from the Greek cory [= helmet] and doras [= skin, incorrectly used here for "armour"]; it refers to the dual row of overlapping plates (instead of scales) along the body, comparable to a suit of armour.
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