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Angelfish are among the more versatile aquarium fish.

admin    June 18, 2019   CATEGORY: Fish Facts

What are the Differences Between Freshwater Fish and Saltwater Fish?

On the surface, the differences between freshwater fish and saltwater fish are obvious: one lives in saltwater and the other lives in freshwater.  If you delve deeper into the issue, however, you’ll see there are actually several less apparent differences based on the biology and history of the fish.

In fact, you could say the two different types of fish are from different worlds.

The Main Differences Between Freshwater Fish and Saltwater Fish

Let’s start with some basic definitions. Saltwater typically refers to water found in oceans and seas, and freshwater is found in lakes, rivers, ponds, and streams. Freshwater only accounts for less than 3 percent of all the water on earth, but ironically, freshwater fish make up almost half of all fish species.

The differences between freshwater fish and saltwater fish include the idea that freshwater fish are more resilient.

Gourami fish are among the more popular fish for freshwater aquariums.

The way fish take in and eliminate water is perhaps the most significant difference between saltwater and freshwater fish. Fishes’ natural biological functions compensate for the environment in which they live in order to survive.

Both types of fish need salt in order to survive, but the way their bodies function is actually the opposite of what one may expect.

A saltwater fish’s body contains less salt than the water around it. In order to prevent dehydration, it takes in a large amount of water and secretes the salt through its gills. In other words, it’s saltwater in and salt out on a regular basis. Saltwater fish produce very little urine in order to hold onto the now more pure water created through this elimination of excess salt.

A freshwater fish, on the other hand, does hold onto the salt in its body because there isn’t as much of it in its environment. It takes water in through its skin and gills all the time in order to stay healthy. As a result, it produces much more urine than saltwater fish.

Other Notable Differences

There are many differences between freshwater fish and saltwater fish, like this black, gold, and white dotted clown triggerfish.

Saltwater fish, like this Clown Triggerfish, tend to be more colorful than freshwater fish.

  • Because the bodies of water that freshwater live in are smaller than oceans and seas, the body of water itself changes over time. As a result, freshwater fish may be tougher and can adapt to their environments easier than saltwater fish do. Saltwater fish that live in abundance of space are accustomed to a more stable lifestyle. As a result, taking care of saltwater fish in an aquarium may be a little more challenging.
  • Freshwater fish can be coldwater fish or tropical fish, while saltwater fish are almost all coldwater fish, which means they are comfortable in slightly cooler water.
  • Saltwater fish tend to be more colorful and diverse in their appearance as a result of how they live and behave in their natural habitat in the ocean or sea.
  • A few types of fish and other animals can live in either saltwater or freshwater, although it’s not common.

Brackish Fish

Scat fish are among the most common brackish fish.

Scat fish are among the most common brackish fish.

Some types of fish live in brackish water, which is where freshwater meets saltwater and where rivers flow into oceans. There isn’t a big selection of these fish, called brackish fish, in the aquarium hobby, although some hobbyists do keep brackish tanks.

Breeds of brackish fish include drum fish, tigerfish, Asian cichlids, halfbeak fish, flagfish, and scats.

TAGS: Brackish Fish, freshwater fish, saltwater fish,

Facts about Discus Fish: Their bodies are flat and round like a discus, and they have distinctive markings on their bodies. Known as the King of the Aquarium, this freshwater fish gets brighter when it senses threat.

admin    May 28, 2019   CATEGORY: Freshwater Aquariums

King of the Aquarium: Facts about Discus Fish

A discus fish is certainly eye-catching, and its body shape gives it a unique elegance that you would enjoy seeing in your freshwater aquarium. But fair warning: discus fish need a lot of love and attention, so they’re more ideal for experienced hobbyists. If you want to give one a home with you anyway or you are an experienced hobbyist who has never owned one of these beauties before, following are some facts about discus fish you might want to know.

Discus Fish Facts for the New or Experienced Hobbyist

• A discus is a type of cichlid.

• It’s known as the “King of the Aquarium Fish.”

• Its body is flat and round, like a discus used in track and field, and it has large, extended fins.

• Discus fish have beautiful patterns on their bodies that generally include wavy lines or nine horizontal stripes.

Discus fish facts: Discus fish are cichlids.  Common colors are red and blue. Known as the King of the Aquarium, this freshwater fish has distinctive marks on its body, which is flat and round like a discus.They are available in a variety of vivid colors, although the three main groups of discus are green, blue, and brown. Their colors get brighter when the fish has intense emotions, such as fear.

• They originate in the Amazon basin of South America.

• Their tiny mouths make them appear as if they are striking a pose.

• Discus prefer warm water with a range of 80 to 86 degrees.

• The pH level of the water should be 5 to 7.

• Its title of “king” is betrayed by its size. A discus fish only grows to about 10 inches and generally weighs less than 9 ounces.

• They are carnivores. Ideal foods for them include blood worms, shrimp, and other substantial frozen foods.

• Males and females will stay together as couples. They stay in slightly acidic water during breeding. Both secrete nourishment from their skin for their newborns. The fry feed off these secretions for up to a couple of weeks.

• They’re peaceful fish, so they get along well with each other.

• In the wild, they’re found in schools, so if you do want to own discus fish, you should have several of them in your freshwater aquarium.

• They’re not the fastest swimmers, which is perhaps why they prefer to stay together.

• The scientific name for discus fish is Symphysodon. The red discus is known as Symphysodon discus, and the blue/brown discus are called Symphysodon aequifasciatus.

• Male discus fish are generally larger than female discus fish.

Discus fish require very clean water, so having the proper filtration system and regular aquarium maintenance is critical to the long-term health of the fish.

• With proper care, your charismatic and charming discus fish can live up to 10 years.

For additional facts about discus fish tank maintenance, contact Seatech Aquariums online or by phone at (602) 628-7270.

Contact Seatech Aquariums for fish tank installation in the greater Phoenix area, as well as additional information or facts about discus fish care.


TAGS: Aquarium Fish Care, Discus Fish, Fish Facts, Freshwater Aquarium,