
A high-quality pellet can be a good base for the Jack Dempsey cichlid
Jack Dempsey
The Jack Dempsey is a species of cichlid that is widely distributed across North and Central America. Its common name refers to its aggressive nature and strong facial features, likened to that of the famous 1920s boxer Jack Dempsey.
What is the best food for Jack Dempsey fish?
What food is right for Jack Dempsey Fish? Jack Dempsey fish food can include pellets, flakes, shellfish, tubifex, brine shrimp, bloodworm, thawed seafood, etc.
How often should I Feed my Jack Dempsey fish?
On the feeding frequency; you should feed your Jack Dempsey fish once or twice every day.
What do you feed Dempseys in captivity?
Feeding in Captivity. Because it has such a diverse diet in the wild, feed your Dempseys a variety of meat-based foods in the aquarium. Crickets, feeder fish, small frogs or other live foods not only will be devoured, but they'll be appreciated as well.
What plants can I plant in a Jack Dempsey fish tank?
Hardy live plants like Anubias and java moss can be grown in a Jack Dempsey fish aquarium. Taller Vallisneria also provides dense cover for the fish to swim through.

What do you feed baby Jack Dempsey?
It's best to feed the fry infusoria for the first 48 hours, and then move them onto either baby brine shrimp or microworms. Commercial fry food can also be used for the fry. As with many other new cichlid parents, Jack Dempseys may consume their first few broods.
How do you take care of a baby Jack Dempsey?
3:188:15Breeding Jack Dempsey Cichlids | Baby Fish Growing in a Classroom ...YouTubeStart of suggested clipEnd of suggested clipThey find a way in some of the worst conditions. And if you're looking to breed them we'd recommendMoreThey find a way in some of the worst conditions. And if you're looking to breed them we'd recommend a sizeable tank of fifty five gallons or larger. And just keeping good water parameters.
How often do you feed Jack Dempsey fish?
How often should I feed my Jack Dempsey cichlid? You should feed juvenile Jack Dempseys 2-3 small meals each day to help them grow. Adults should be fed 1-2 times a day. It's important not to overfeed, so only give them as much food as they will eat in about 2 minutes and immediately remove any uneaten food.
How long does it take a Jack Dempsey cichlid to grow?
A: In common, they can live for up to 10 – 15 years. Q: How fast is the jack dempsey cichlid's growth rate? A: We have done a couple of researches in different online forums, most respondents say that Jack dempseys grow relatively slow. A three-year-old spans 9 inches, and 21 month old spans about 7 inches.
What do Jack Dempsey fish like to eat?
In the wild, the carnivorous Jack Dempsey will consume any animal that fits in its mouth, including small fish, worms, insects and crustaceans. Because they aren't fussy, you can feed them prepared, frozen, fresh or live food. Processed dried foods, including pellets and flakes, are inexpensive and widely available.
Why did my Jack Dempsey turn black?
Not unlike human beings, fish experience both highs and lows in their spirits. If a Jack Dempsey cichlid's coloration abruptly and seemingly out of nowhere turns paler, it could be a sign of a fish who is unhappy or irked about something.
Can I feed my Jack Dempsey crickets?
Because it has such a diverse diet in the wild, feed your Dempseys a variety of meat-based foods in the aquarium. Crickets, feeder fish, small frogs or other live foods not only will be devoured, but they'll be appreciated as well.
How can you tell if a Jack Dempsey is male or female?
The most reliable way to tell male from female Jack Dempseys is to check their cheeks. Males have bluish spots directly behind their eyes, with no spots on the lower part near their mouth. Markings on females extend the full length of the cheek with large iridescent blotches on the lowest part of the cheek.
What temperature should a Jack Dempsey tank be?
72-86° FThe recommended temperature range for a Jack Dempsey cichlid is 72-86° F (22-30° C), but many aquarists make sure that the temperature never goes above 78° F (25.5 degrees C) since warm water can increase the aggressiveness in some Jack Dempsey cichlids.
What size tank does a Jack Dempsey need?
Juveniles can be kept in a 55 gallon tank until they reach full maturity. An adult Jack Dempsey needs at least an 80 gallon aquarium. For each additional Jack Dempsey in the tank you should add 20 gallons.
What is the lifespan of a Jack Dempsey fish?
Quick Facts about Jack Dempsey'sSpecies Name:Rocio OctofasciataLifespan:8 to 15 yearsSize:12 to 15 inchesDiet:CarnivoreMinimum Tank Size:180 gallons per fish, 300 gallons for a small community tank7 more rows•Feb 10, 2022
Can two Jack Dempseys live together?
Large cichlids, such as Jack Dempseys and Oscar fish, are known for levels of aggression from mild to very aggressive. So, can you keep them together? The answer is yes, providing a couple of conditions are met.
What fish can I put with a Jack Dempsey?
4:0611:50Top 10 Tank Mates for Jack Dempsey Cichlids - YouTubeYouTubeStart of suggested clipEnd of suggested clipGreen turquoise and even the mouth brooding type that i have severums and jacks are both heartyMoreGreen turquoise and even the mouth brooding type that i have severums and jacks are both hearty cichlids that can go well together and i would recommend a tank size over 75 gallons silver dollars make
Can two Jack Dempseys live together?
Large cichlids, such as Jack Dempseys and Oscar fish, are known for levels of aggression from mild to very aggressive. So, can you keep them together? The answer is yes, providing a couple of conditions are met.
How do I stop my Jack Dempsey from being aggressive?
5:507:07Jack Dempsey Fish Fighting and Aggression - YouTubeYouTubeStart of suggested clipEnd of suggested clipAs you can see the tank is stacked with pots. And you it really helps to move those around and thatMoreAs you can see the tank is stacked with pots. And you it really helps to move those around and that that might move aggression levels because maybe they're trying to claim a spot to breed.
What to feed Dempseys?
Because it has such a diverse diet in the wild, feed your Dempseys a variety of meat-based foods in the aquarium. Crickets, feeder fish, small frogs or other live foods not only will be devoured, but they'll be appreciated as well. A high-quality pellet food designed specifically for cichlids is an excellent base for your Dempsey's diet, as long as you incorporate either live or freeze-dried meats. Because Jack Dempsey cichlids eat plants in the wild as well, incorporate kale, lettuces or plankton every now and then.
Where do Jack Dempsey cichlids live?
Native to North and Central America, the Jack Dempsey cichlid is an aggressive fish that prefers the muddy waters of canals, ditches and swamps of the Papaloapan and Hondurian Ulua rivers. In these murky waters, this fish attacks its prey, hidden by the plants and low visibility.
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Jack Dempsey Overview
Jack Dempsey fish are respected and praised amongst the predator fish community. They are well sought after as one of the best predatory cichlids for aquarists. Although they make a desirable pet fish, they are one of the most misunderstood fish in the hobby.
Typical Behavior & Temperament
If you are not used to caring for a predatory species of fish that is aggressive, you might be put off on owning one of these fish. This makes Jack Dempsey fish better suited for intermediates who have some experience with aquatic fish keeping. Jack Dempsey’s are quite aggressive and will attack and eat other fish in a poorly populated tank.
Appearance & Varieties
This attractive species of fish has long fins with an oval body. The males will have longer finned and be slightly larger than female Jack Dempsey fish. Their name originates from their similar features arising from the Boxer in the 1920s, Jack Dempsey. They have a set of unique colors and are seen in various shades of golds, pinks, and blues.
What to Feed Your Jack Dempsey
These fish are primarily carnivores and consume a meat-based diet. They thoroughly enjoy a variety of live foods rich in protein. They are not fussy when it comes to feeding time and will happily eat what you can provide. This makes it essential to ensure that you are providing them with the best diet possible.
Keeping Your Jack Dempsey Healthy
Keeping them healthy is achievable if their needs are met. A large tank, a good diet, and suitable tank mates will ensure your Jack Dempsey is thriving. If your fish is on a low-quality diet, they will not be able to develop properly and have a shortened lifespan as a result. This is also true if their tank requirements are not met.
Breeding
Jack Dempsey’s will only successfully mate if their breeding conditions are almost an exact replicate to their wild conditions. This means that the water temperature should be raised to 80°F and the water must be kept pristine. A gradual succession of water changes over a period should be done to encourage breeding.
What substrate do Jack Dempsey fish use?
The fish may use different substrates such as large flat stone, flower pot, or some section of a tank bottom cleaned from the substrate. There were also cases when fish, just like dwarf cichlids, laid their eggs inside their nookery.
How clean should Jack Dempsey's tank be?
As a majority of Central America cichlids, Jack Dempsey fish doesn’t have any special requirements for the tank conditions. Nevertheless, the tank water should be clean, i.e., with zero ammonia and nitrite levels, and nitrate concentration shouldn’t exceed 40 mg/l.
What is Jack Dempsey?
The Jack Dempsey fish (lat. Rocio octofasciata, earlier called Cichlasoma octofasciatum) is a widely spread tank fish within North and Central America. Because of the fish’s congenital aggressiveness towards its tank mates, the USA aquarists have called it Jack Dempsey by the popular professional boxer’s name.
How long does Jack Dempsey live?
Meanwhile, provided with proper care, Jack Dempsey lifespan in a tank is about ten years and more. Except for poor quality water, other factors such as improper diet, frequent spawning, and stress influence its lifespan.
What do you feed a cichlasoma?
This Cichlasoma is a predator, so you should feed it with live feed: brine shrimp, blood worm, tubifex, though thawed and milled seafood will do as well.
Can Jack Dempsey put plants in a tank?
However, the main warning when keeping Jack Dempsey in a decorated tank is the fish “vandalism” towards any tank plants. In general, it’s possible to put some plants in a tank, the fish doesn’t eat them, but it can harm them once it decides that the plants don’t belong here.
Can Jack Dempsey fish live in a small tank?
In spacious tanks, Jack Dempsey fish doesn’t show such aggression, as they may do in small capacity tanks. Therefore you can keep the fish together with other equal-sized cichlid species.
What is Jack Dempsey's fish?
Jack Dempsey fish overview. The Jack Dempsey fish is one of the most popular freshwater aquarium fish. They’re in the cichlid family which includes over 1,500 species including angelfish, African cichlids and discus. Jacks are named after world heavyweight boxing champion (1919-1926) Jack Dempsey. Nicknamed the “Manassa Mauler”, Jack Dempsey was ...
How big should Jack Dempsey fish be?
Jack Dempsey fish are frequently sold as juveniles, measuring 2 to 3 inches in length. The young fish are often “packed” into a display tank at the aquarium shop. This leads novice aquarists to believe the fish will stay relatively small and live happily in a 10 or 20 gallon aquarium. The truth is, the Jack Dempsey will quickly outgrow a small fish tank. If you’re going to keep one or more of these fish, it is best to set up an aquarium dedicated to the needs of your Jack Dempsey fish. Since the fish will grow to a length of 10 inches, a 55-gallon or larger aquarium is recommended. These big fish need room to swim and explore. They are territorial and will act more aggressively when too many fish are kept in the same tank. Two or three mature Dempseys should be quite happy in a 55- to 150-gallon aquarium. But there’s more than aquarium size to consider when keeping large cichlids like Jack Dempsey fish. Here is a breakdown of all the important parameters and aquarium hardware needed to keep your Jack Dempsey healthy and happy.
What is the best lighting for a Jack Dempsey aquarium?
A properly illuminated tank creates the appearance of deep water and brings out the color of your Jack Dempsey fish. Fluorescent lighting is the standard light style for aquariums, but LED lighting fixtures are quickly becoming the favorite fixture for aquarium lighting. Here’s why. Most fluorescent aquarium bulbs are designed to highlight the artificial “Day-Glo” colors of aquarium gravel, plastic plants and ornaments. That’s great if that’s the look you’re going for. But the natural colors of tropical fish are often lost in this artificial light. Natural “daylight” fluorescent light bulbs are available as a retrofit, making it easier to grow plants and create a more natural-looking aquarium. However, the light quality of fluorescent bulbs begins degrading as soon as they are turned on. The lights will gradually dim and the color shift over a period of 9-12 months. The bulbs require replacement to maintain the same level of illumination. LED lighting uses much less energy and lasts for many years. Basic LED aquarium fixtures will provide natural-looking light and very low energy consumption. Some fixtures even have a built-in timer. The next level of light fixture has more LEDS for better light coverage, especially in deep aquariums. Some models even allow you to custom-tailor the light color to highlight the fish’s colors and create a gradual sunrise and sunset lighting program.
Where do Jack Dempsey fish live?
Natural habitat. The original wild Jack Dempsey fish, currently classified as Rocio octofasciata, is a native to Mexico ( Papaloapán River ), the Yucatan, Honduras ( Ulua River) and Guatemala. The fish can be found thriving in a variety of environments other tropical fish could not survive.
What is the body shape of a Jack Dempsey?
The body shape is called “laterally compressed.”. This is a fancy term that means the fish looks thin when you look at it face to face. This body shape is common to a many of the carnivorous, predatory fish species. If you happen to be prey, the thin build of the Jack Dempsey is hard to see.
Can Jack Dempsey cichlids be aggressive?
Likewise, Jack Dempsey cichlids can be very aggressive toward other fish in the aquarium. Even so, the Dempsey’s interesting personality and beautiful coloration are a favorite among cichlid enthusiasts. Here’s what you need to know about keeping Jack Dempsey’s in your aquarium. Contents [ show] Natural habitat.
What is Jack Dempsey's favorite food?
Ocean plankton, tubifex, and blood worms are the favorite foods. Supplementary vegetables are also important for their optimal health. In addition, black worms, ghost shrimp, carnivore pellet, and brine shrimp are famous and healthy foods of Jack Dempsey.
What do electric blue dempseys eat?
Perfect Feeding for Electric Blue Dempsey. Dempsey is a greedy nature animal. Swallow insects, worms, and other frozen and dry substances are considered the best food for Dempsey. They like to eat frozen and well-prepared foods. Ocean plankton, tubifex, and blood worms are the favorite foods.
Why is my Blue Jack Dempsey tank HLLE?
Some people also say HLLE is due to lack of food, activated carbon water, poor diet, and water filtration. Bacterial infections and fungus diseases are also dangerous. But for these purposes, you should adequately learn about Electric Blue Jack Dempsey tank setup.
Why is Electric Blue Jack Dempsey so famous?
That’s why it is famous as Electric Blue Jack Dempsey. Further, its green spots give a sharp look. Their colors will deepen more when they breed. The coloration of a female will soften than that of male fish. The rocio octofasciata likes to live in canals with heavy vegetation out of the homes.
What temperature should Blue Jack Dempsey water be?
In such a way, Dempsey can hide in it. The Electric Blue Jack Dempsey water temperature should range from 78-82 °F, and the 7.0 PH level of water will be best. Contents show. 1 Nature of Electric Blue Jack Dempsey. 2 Physical Appearance.
What does the Blue Dempsey need?
Electric Blue Dempsey needs algae plants and lives to grub in the ground. For shelter of eggs, they take the help of stones, snags as well as caves. In this way, Dempsey can enjoy it as well as keep their eggs safe.
How much water does a Dempsey need?
150 liters of water is necessary for one mature couple. As Dempsey’s size increases, then you should increase the water level up to 200 liters.
How do Jack Dempseys breed?
As substrate spawners, Jack Dempseys breed in the open. They will often breed without any intervention, but they can be conditioned by feeding live foods prior to spawning. The parent fish will clean a flat space on a rock or the aquarium glass before depositing between 500 and 800 eggs on the surface.
Caring for Jack Dempsey eggs and hatchlings
If your mated Jack Dempseys are the only fish in your tank, you can allow them to care for their young as they see fit. These fish are generally very good parents. As long as you provide adequate food and housing conditions, you will not need to interfere with the eggs or the fry.
Related Questions
Parent fish will care for their fry for about six weeks. At this point, the hatchlings are grown enough to care for themselves.

Appearance
Behavior
- One may choose to call the Jack Dempsey fish ‘a beautiful beast’ when considering its behavioral traits. This is because of its aggressive tendencies towards tank mates –this fish does not always share its space peaceably with others; it will not tolerate intrusion. In essence, it is quite territorial; hence, it is best to leave them alone in the tank. But besides the sight of other tank mates trigger…
Feeding
- Though they may be predatory- which makes some people classify them as ‘carnivores’ – the Jack Dempsey fish are omnivores when it comes to feeling. What food is right for Jack Dempsey Fish? Jack Dempsey fish food can include pellets, flakes, shellfish, tubifex, brine shrimp, bloodworm, thawed seafood, etc. They also like vegetables such as cabbage,...
Care
- The Jack Dempsey fish are not so demanding as they can thrive in a wide range of water conditions, and also feed on different kinds of food; this is some of the reasons many aquarists[and even beginners] in particular have come to adopt them as their aquatic pet of choice. Despite their hardiness, however, it is essential that you do not leave them to dwell in a …
Tank Setup
- The Jack Dempsey fish are found in slow-moving– or even still – warm water with a sandy bottom and a lot of hiding spots, and it is with this in mind that I shall now proceed to discuss the tank setup. What tank size is right for Jack Dempsey?Jackey Dempsey should be housed in a tank with a minimum carrying capacity of about 190 liters – and maybe a bigger tank depending on the nu…
Water Parameters
- Jack Dempsey fish can tolerate poor water quality to some extent, but this would undoubtedly shorten their lifespan. So, it is of importance that you have them in a conducive (water) environment that would promote good health. In this wise, you should ensure that the following water chemistry is sustained within the aquarium at all times: 1. Water temperature:Jack Demps…
Compatibility
- Bearing in mind that the Jack Dempsey fish is a predatory species when attempting to select tank mates for them, you will have to look away from relatively smaller fishes that can be easily feasted on by Jack Dempsey. Jack Dempsey fish tank mates can be Oscars, firemouth cichlids, kissing gourami, koi, angelfish, cave tetras, and green terror. And, you could yet keep a group of …
Sex Differences
- Differentiating between the male and female Jack Dempsey fish is not so much of a difficult task. All you have to do is to pay close attention to a couple of features. So, to start with; the dorsal fin and the anal fin of the male Jack Dempsey fish are usually longer and pointier than those of the female. Generally, the male is larger than the female and is usually more brightly colored. Furthe…
Breeding
- Jack Dempsey fish are typically more hostile during spawning, and upon being ready to spawn, the pair pick out a choice substrate on which mating will take place. The female eventually moves to lay the egg around a corner or in a hiding spot; the male follows after her to fertilize the eggs. The Jack Dempsey fish are quite productive as they are capable of laying up to 500–800 in a sin…
Diseases
- Despite their hardiness, Jack Dempseys may also get downed by some diseases which affected by freshwater species, and as observable in most diseased conditions affecting aquarium fishes; poor water quality and unhealthy diet are usually the primary causes. The introduction of an infected species may also lead to the breakout of diseases in the tank. So without further ado, le…