Oscar Fish Overview, Care Guide, Tank Mates, Aquarium Setup, Water Conditions, Diet & Breeding:
Oscar fish shows aggression &
aquarists keep them in aquarium because of their beautiful colors & look, & they also have better IQ & their social behavior is appreciable.
They need high care & need expert
aquarists. Oscars are omnivorous & they eat easily but it is difficult to
find the right mate.
Oscar is a worthy fish that you
can keep in aquarium & they look very beautiful.
Category |
Rating |
Care Level |
Medium |
Behavior |
Aggressive / Territorial |
Color Form |
Diverse |
Lifespan |
Up to 20 Years |
Size |
Up to 12 inches |
Food |
Omnivore |
Family |
Cichlidae |
Min. Aquarium Size |
55 gallons |
Aquarium Water |
Freshwater |
Tank Mates |
Big, Passive Species |
Oscar fish is a cichlid specie so
they are from Cichlidae family. Majority of the Cichlids are from Africa or
South America.
Oscars are found in Brazil,
Ecuador, Columbia, French Guiana & Peru. You can find them in Amazon rivers & its neighboring locations.
Oscar Fish Care Guide:
Oscars can be found in many fish
shops, & you can get one for less than $10.
Oscar is territorial & addition
of this fish can be dangerous.
Mating different varieties of Oscars
can give birth to various colors & patterns. Life span of Oscar is up to 20
years if you take good care.
They attack other fish that try
to enter their territory which can result in a fight. Also during mating &
eating, they can be aggressive to other fish.
They swim in the mid-levels of
aquarium most of the time, & can also search for food in the gravels. They
are messy fish & can uproot aquarium plantation & mess with decorations in
aquarium while finding food.
Setting up aquarium correctly can
allow you to keep Oscar with other mates easily which tremendously reduces chances
of aggression from Oscars.
Choose a filter that creates
strong current because Oscar likes to be in fast flowing water.
Oscar Fish Aquarium Setup:
Setup your tank that copy the
same natural conditions of the wild. In the wild, Oscars live in warm fresh water with
neutral pH. Setup
soft substrate with rocks & caves at the bottom of your aquarium. Also Oscars
enjoy planted aquariums. Setting up your aquarium like Oscars native water is
not difficult.
Set up a layer of soft substrate
at the bottom of aquarium. Make sure that substrates are fine grained, so
setting up sand in this aquarium is a good idea. Oscars like digging so in case
of coarse gravels, your fish might get scratched.
Setting up caves will allow
Oscars to hide underneath them. Make sure you firmly setup decorations &
plantations in your aquariums so Oscars can’t uproot them.
Oscars do not eat plants that much in case other diets are available but there
are greater chances of uprooting them if you put them in aquarium. Floating
plants are a safe addition to Oscar tank & you can choose hornwort.
Best water conditions for Oscar
is between 74 to 81 degree Fahrenheit, 6 to 8 pH, & 5 to 20 KH.
Only a filter is required for
cleaning aquarium water & also a heater can keep water warm. Have an
aquarium light too & turn it on during day. Too much lighting can help in
developing algae. Cover your aquarium top with a lid because Oscar can jump out
or could fight against other fish & force them to escape the tank.
The minimum requirement of
aquarium size for Oscar is 55 gallons. Anything smaller can put stress on the
fish & could make them sick or aggressive.
Oscars are territorial fish so
they need lots of free space in aquarium. 55 gallon tank is required for one
Oscar & add 20 to 30 gallons more water if you want to keep an extra Oscar fish.
Tank Mates for Oscar Fish:
Oscars are not good friends. While
living in South America they live in regions that are mostly diverse & they
used to be with large number of fish.
Keeping Oscar in aquarium with
mates is not easy. Due to small space they show more aggression. Keeping Oscar
with other Oscars is not a bad idea in case you have a large aquarium.
If you want more fish in aquarium
then select species that are big, passive in nature that are able to defend
themselves & can escape the attack of territorial Oscar.
Aggressive behavior of Oscar cause
other fish to live in fear, so select passive fish. You can keep other large fish
including Arowanas, Convict Cichlids, Firemouth Cichlids, Bichirs, Green
Terrors, Jaguar Cichlids, Silver Dollars etc.
Fellow cichlids are best friends of Oscar. If you want to keep smaller fish in Oscar aquarium, then they will vanish from the aquarium. Little invertebrates will disappear too if you keep them in Oscar aquarium such as Shrimp & Snails.
You can keep Oscars in one
aquarium & this seems to be the best choice. Oscar will fight against another Oscar if it enters its territory. Ensuring lots of free space in aquarium will lower this tension.
Oscar Fish Diet:
Oscars are omnivorous & love
to eat any diet. Oscars in rivers eat small fish & also plant debris. Also
they eat little insects & crustaceans.
In tanks they like to eat flakes
/ pellets. Their diet has all nutrition that the fish need.
More choices include live /
frozen diets which consist of protein. You can offer them brine shrimp &
daphnia. Live food is a special diet for Oscars because they love catching
their prey.
Oscars love to eat green
vegetables that you can chop down & feed them. Green vegetables are also
used for preparing a homemade diet for Oscars.
Though they could eat plants
debris, but mostly they don’t eat them if there are other special foods
available.
The ideal food for Oscars is a
mix of different diets to offer a range of nutrition which they will need for
healthy life.
Offer food to Oscars a couple of
times every day, in small amounts that can be eaten up within 2 minutes.
Oscar Fish Breeding:
Breeding Oscars in aquarium is
very difficult. Oscars don’t like to mate easily due to their picky nature,
so adding just male & female Oscars won’t be enough for breeding.
Purchasing an already established
pair from the fish store is the best option. You can also raise a collection of
babies, as they are raised in community then find perfect mates. However, this
is not an easy choice because young Oscars will take time to mature & would
take around 1 to 2 years to get fully matured & ready for breeding.
Oscars like to breed in the wild usually
in rainy season. If you want to establish rainy season in tank, then lowering
tank temperature a couple of degrees can help. Change water after every couple
of days with water sprinkling over the top for a few minutes every day will
help in reproducing rainy season.
When they are ready to lay eggs,
they will clean the surface of rock where female can lay eggs. The largest
Oscar female can lay up to 3000 eggs.
Oscar pair will protect the eggs
until they hatch. Male Oscar guard the eggs from other fish.
Shift little Oscars to another aquarium that have a sponge filter. Offering food 2 to 4 times every day will help them in fast growth.
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