Description :
The
Electric Blue Jack Dempsey is a freshwater fish that originates in the murky
warm waters of Central America. It has a base color of electric blue to gray,
and displays many iridescent blue and green spots, giving this fish a spectacular
look.
Quick stats:
Listed
tank sizes are the minimum
|
|
Size:
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10 inches (25.0 cm)
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Tank:
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48 inches, larger for adults
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Strata:
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Bottom, middle
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PH:
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7 to 8.5
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Hardness:
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Medium hard to very hard
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Temperature:
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77° to 82°F (22 to 30°C)
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Classification:
Order:
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Perciformes
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Suborder:
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Percoidei
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Family:
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Chiclidae
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Genera:
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Cichlasoma
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Status: This
species is not listed on the IUCN Red List.
Distribution
Central America, Honduras, Guatemala and the Yucatan.
General Body Form:
Somewhat elongated with lateral compression. In the males the Dorsal and
Anal fins are pointed and can reach a length to the middle of the Caudal fin.
In the females they are shorter and more rounded. The Caudal fin is fan shaped.
In older males the forehead swells to a telltale bump.
Coloration:
The male "Jack" base color is a dark Brown to Gray Brown,
which when spawning or in top condition becomes dark Blue or Blue Black. On the
scales on the sides there is a beautiful shinning Blue or Blue Green dot. The
young have a series of seven or eight faint up and down bars that usually
disappear in adults unless they are stressed or excited. A long Black
Longitudinal band runs from the rear edge of the gill covers to a large Yellow
edged Black spot in the middle of the side. There is also a similar spot at the
start of the Caudal fin. The cheeks and gill covers themselves are covered with
Blue dots and the lips are a pale Blue. The Dorsal fin is dark and has a thin
Red border. The females are paler in color and the Blue is not as intense.
Scientific Name : Cichlasoma octofasciatum
Common Names : Jack Dempsey Fish, Electric Blue Jack Dempsey
Care Level : Easy
Size : Anywhere from 6 - 10 inches (15 - 25 cm)
pH : 6 - 8.0
Temperature : 75°F - 80°F (24°C - 27°C)
Water Hardness : 5° to 15° dH
Lifespan : 10 - 15 years or longer
Origin / Habitat : Wild caught specimens originate from Central America,
Guatemala, and Southern Mexico but hobbyists usually will be buying a farm
raised fish. They are often found in slow moving rivers and canals in Central
America.
Jack Dempsey Fish Temperament /
Behavior : If given a large enough tank (55
gallon or larger) you may not see them being overly aggressive. If you cramp
them into smaller tanks, like most fish, they may become more aggressive. Watch
them closely.
Care and feeding:
Since
they are omnivorous, the Electric Blue Jack Dempsey will generally eat all
kinds of live, fresh, and flake or pelleted foods. They get quite large so they
should be fed a high quality pelleted food and large chunk foods such as meat
or fish.
A minimum 40 gallon aquarium is suggested,
though a larger tank would be suggested if keeping in a semi-aggressive
community tank with other like sized fish. They need good water movement along
with strong and efficient filtration. Provide a bottom of fine sand and plenty
of hiding places among rocks and wood. Plants are appreciated but should be
hardy, such as Sagittaria. Place the plants around the inside perimeter leaving
an open area in the center for swimming. The plants should be potted to protect
the roots.
The Electric Blue Jack Dempsey is a rewarding specimen for the aquarist as it is moderately easy to keep as long as the aquarium is maintained. They are subject to infections as well as other diseases that ail all freshwater fish. To help prevent the notorious 'Hole-in-the-Head' disease (HLLE - Head and Lateral Line Disease) that large cichlids are prone to, do water changes of 20 to 25% a week, depending on bio load
Acceptable Water Conditions: Although Dempsey's can tolerate a fairly wide range of conditions, it has been suggested that warmer temperatures lead to more aggression in this fish. Many aquarists will keep the maximum aquarium temperature below 78° F (26° C) to help reduce antagonism.
Hardness: 8-12° dGH
Ph: 6.5-7.0
Temperature: 72 - 86° F (22 - 30° C)
Social Behaviors: Though Jack Dempsey's are not considered good community fish as they get territorial, the Electric Blue Jack Dempsey has demonstrated a much more tolerant attitude towards tankmates. They also can get more territorial as they get older and so may need to be kept individually in a species tank. If keeping more than one, it is easier and safer for them to keep them in large groups rather than in pairs.
Sexual Differences: The
male has a longer and more pointed dorsal fin than the female. The male may
also have a round black spot in the center of the body and at the base of the
tail. The female has fewer spots than the male.
Breeding
:
Jack Dempsey's are open breeders that need well-oxygenated water. They spawn in
burrows, laying up to 500 eggs. The fry are well protected by the parents, and
once mated, they will continue to spawn once the fry have grown.
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Reference & Picture Credit :
http://animal-world.com/encyclo/fresh/fresh.htm#Cichlids
http://jackdempseycichlid.com/general/electric-blue-jack-dempsey-cichlid/
http://www.school-of-tropical-fish.com/jack-dempsey-cichlid.html