
Some delicacies that they will enjoy are:
- Bloodworms
- Fresh or frozen shrimp
- Fruit flies
- Brine shrimp
- Crickets
- Grasshoppers
What can I Feed my Jack Dempseys?
Any kind of sunken ship, castle, or log will do as long as there are several holes for your fish to hide inside. In the wild, Jack Dempseys live on a diet of worms, insects, shrimp, and even other fish. In your home, however, any kind of flake or pellet food should do the job. Be sure to add in some live meaty foods, too.
Is a Jack Dempsey fish a carnivore?
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.
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 Jack Dempsey lizards eat?
Some of the fresh and live foods that you should feed them are bloodworms, brine shrimp, fruit flies, fresh or frozen shrimp, crickets, and several others. Adult Jack Dempsey need to be fed twice a day, whereas the young ones need two or three feedings as they need more nutrition to grow.

What do baby Jack Dempsey fish eat?
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 often do you feed Jack Dempsey?
1-2 times a dayHow 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.
What do you feed Electric Blue Jack Dempsey?
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.
How do you feed a Jack Dempsey Fry?
0:586:55JACK DEMPSEY - Care Guide (PLUS FRY!) - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you look at the dorsal fin males will have a longer pointed fin also for females the colorationMoreIf you look at the dorsal fin males will have a longer pointed fin also for females the coloration on their Gill plate will be more spotted and colored as you can see Jack here has a row of spots.
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.
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.
How do you keep an Electric Blue Jack Dempsey alive?
1:143:17Electric Blue Jack Dempsey Cichlid Care & Information - YouTubeYouTubeStart of suggested clipEnd of suggested clipIt's advised to keep a kind of divider in their tank to allow the fish to claim their ownMoreIt's advised to keep a kind of divider in their tank to allow the fish to claim their own territories. As well as keeping them in a group of about six or more.
How fast do Jack Dempsey fish 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.
Do Jack Dempseys need a bubbler?
The Jack Dempsey fish is a freshwater species of cichlid. Jack Dempsey fish have aggressive natures, like their namesake, the legendary heavyweight boxing champion, Jack Dempsey....Tank Conditions.Water type:Slightly acidic, slow-moving freshwaterBubbler:Not necessary because the fish prefer a slow current9 more rows•Feb 25, 2022
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
How big will a Jack Dempsey cichlid get?
seven to eight inchesSize: Perch-like in shape, the Cichlasoma octofasciatum is a large cichlid, reaching seven to eight inches (18-20 cm). Behavior: Its common name refers to the boxer, Jack Dempsey, because of its fighting demeanor. They are extremely aggressive and excitable; schools are formed only when young.
Where do Jack Dempsey fish live?
A member of the Cichlidae family, which also includes angelfish and discus, the Jack Dempsey fish, or Rocio octofasciata, is native to Central America in places like Mexico, Belize, Guatemala, and Honduras. In addition to their native habitats, Jack Dempseys have been found in Australia, Thailand and even the United States, including Florida, ...
What temperature should Jack Dempseys water be?
A heater is essential to maintain a water temperature between 72 and 86 degrees. Keep a thermometer in the tank to ensure the temperature remains within this range. Jack Dempseys prefer a somewhat acidic environment, so keep the pH from around 6 to 8. In terms of water hardness, shoot for a range of 9-20 dGH.
How to tell when Jack Dempseys are ready to mate?
Pay attention to the color of your fish when attempting breeding. This will give you a good indication of the timeline and when they are ready to mate. When they are, Jack Dempseys will darken in color, turning nearly black. If the female isn’t yet ready to breed, the male may try to chase and harass her.
How long do Jack Dempseys live?
With proper care, Jack Dempseys can live from eight to ten years. Water quality can influence this significantly, so keep your tank clean to prevent disease-causing organisms from breeding. Always quarantine new animals, plants, and rocks before you add them to your aquarium.
How to treat ectoparasites in fish tank?
To treat fish affected by this ectoparasite, raise the water temperature in your tank to 86 degrees. Poor nutrition can lead to head and lateral line erosion, or HLLE, a common disease that produces pits or cavities on the fish’s head. Changing to a proper diet should alleviate the symptoms of HLLE.
How many gallons of water do a fish tank hold?
The minimum tank size should be 55 gallons to satisfy each fish’s territorial instinct. Two or three adults would be happy with a tank that holds from 55 to 150 gallons.
What color is a blue Jack Dempsey?
If you prefer a less aggressive fish than the standard Jack, the smaller Electric Blue Jack Dempsey features an iridescent pale blue color and longer fins. However, as often occurs with hybrids, there are individuals that display various skull shapes among siblings, and some may feature irregular scales.
What is Jack Dempsey's fish?
Jack Dempsey Fish Care: Tank Mates, Diet, Size, And More! Jack Dempseys, more commonly referred to as Rocio octofasciata, are a tropical climate fish found in murky waters. Named after the famed American World Heavyweight Champion boxer, these fish belong to the cichlid order. Specifically, the South American Cichlid.
How big of a tank do Jack Dempsey fish need?
You will want to emulate their natural setting as closely as you can. Begin with at least a 55-gallon tropical freshwater tank. This will accommodate one Jack Dempsey. If you plan on keeping more fish, an increase in tank size is a must.
How long do Jack Dempseys live?
If properly maintained and cared for, Jack Dempseys can live for up to eight to 10 years. In the healthiest of environments, some have even made it to 15!
How many eggs do Jack Dempseys lay?
The female will lay some 500 to 800 eggs. Once hatched, the parental Jack Dempseys will feed their fry as a mother bird does with her young. They will first chew up the food and then release it into the young’s mouth for consumption. Breeding Jack Dempsey fish is moderately difficult.
How much water does Jack Dempsey need?
Before you commit to Jack Dempseys you need to be sure that you have the capacity to keep them. Each fish needs at least 55 gallons of water. If you’re going to be keeping a group of them, you’ll need a minimum of 80 gallons. As fish that like to stay busy, you can expect a lot of activity in your tank.
Why add water to Jack Dempseys?
Water needs added this often to counter the problems caused by natural evaporation. You will generally be replacing 15 to 20% of your tank’s water volume. Jack Dempseys are very sensitive to incorrect pH levels. Other pollutants can develop when the water gets too hard from evaporation.
How much does a blue jack fish cost?
The most famous and sought after is the brilliant Electric Blue Jack Dempsey. Standard breeds will usually cost around five to 10 bucks .
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 color are the tips of the dorsal fins?
The tips of the dorsal fin are colored red. Females appear similar to the males. Some aquarists say the females are smaller and appear a bit paler in color. The Electric Blue Jack Dempsey fish variety is a bit smaller than regular Jack Dempseys but has an iridescent “electric blue” color.
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.
Do cichlids have waste?
Large cichlids, like Jack Dempsey fish, produce a lot of solid waste. Unlike small tropical fish, Jack Dempsey waste is quite large and visible in the aquarium. You’ll want a powerful filter capable to suspending waste particles and filtering them out of the water.
Species Overview
The Jack Dempsey Fish is named after the American professional boxer William Harrison Dempsey, who spent the greater part of his career as the world heavyweight champion. The fish is known to resemble the boxer, both in temperament and appearance.
Appearance
The Jack Dempsey Fish is named after the renowned professional boxer because its facial features closely resemble those of him.
Types of Jack Dempsey Fish
There aren’t many varieties of the Jack Dempsey Fish, except the Electric Blue Jack Dempsey. Not only do they have a striking electric blue-colored body with black spots on them, but they are much less aggressive than their counterparts.
Size
Jack Dempsey Fish are on the larger side when it comes to fish sizes. In their natural habitat, the males can grow up to 12 inches, whereas the females can top out at 10 inches.
Jack Dempsey Fish Care
If you want to raise and breed Jack Dempsey Fish in your home aquarium, you will have to consider and learn a lot of things before you are fully ready.
What Do Jack Dempsey Fish Eat?
To ensure that your Jack Dempsey Fish are healthy and also grow properly, you have to take care of their diet as well.
Behavior & Temperament
The sole reason why Jack Dempsey Fish are named after a legendary boxer is because they have an aggressive temperament, which is something boxers are known to exhibit in the ring.
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.
Jack Dempsey Fish Overview
The Jack Dempsey (Rocio octofasciata) is a cichlid found in Mexico, Belize, Guatemala, and Honduras’ freshwater streams and rivers.
Jack Dempsey Fish Tank: Preparation and Setup
If you wish to keep this species, be aware that you’ll need a very large tank. As a bare minimum, I would recommend a 55 gallon (208 liters) tank for a single fish.
Feeding and Diet Requirements
Carnivores, Dempseys pursue live prey in the wild. This means that a diversified, high-animal-protein diet is essential.
Are Jack Dempsey Fish Right For You?
In the hobby, this is one of my all-time favorite fish. They’re large and badass, with vibrant colors and engaging personalities.
Origin and descriptions
The Jack Dempsey fish is a freshwater fish that is native to North and Central America. It is a popular aquarium fish because of its bright colors and active nature. They can grow up to 20 inches in length, making them one of the larger members of the cichlid family.
Species profile
The Jack Dempsey is a cichlid fish, native to Central America. It has been described as the largest of all freshwater fishes in North and South America. They can be found living in rivers and lakes in areas such as Costa Rica and Guatemala.
Jack dempsey fish care
Caring for Jack Dempsey fish is not difficult. You need to provide them with the proper housing and give them a good diet. A 60-gallon aquarium will work for one Jack dempsey, but if you plan on keeping more than one, it is best to upgrade so they have plenty of room.
Conclusion
The Jack Dempsey fish is an interesting and beautiful addition to any aquarium. They are relatively easy to care for, but do require a large tank with plenty of hiding places. They are carnivores and will eat other fish, so be sure to research the types of fish that can live safely in an aquarium with a Dempsey before adding one.

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…
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…
Species Summary
Appearance and Size
General Care Guidelines
Recommended Tank and Water Conditions
Jack Dempsey Fish Food & Diet
- 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. No matter whether the pellets fl...
Behavior & Temperament
Jack Dempsey Fish Tank Mates: Good and Bad
Breeding Advice
Are They Right For You?