Consider a more traditional home aquarium fish (if you can call them that). Platinum Arowana is the name of this fish. This is among the most expensive aquarium fishes, costing approximately 400,000 USD. The only other fish that come close are the Asain Arowana, which are the platinum Arowana's counterparts. The platinum color is the most expensive, but other colors can cost up to 300,000 USD. Because of its endangered status and the mafia trade that surrounds it, this species is extremely expensive. Owning one of these beauties can be difficult. But it's the one fish that every owner wishes they had!

The Arowana, also known as the dragonfish, is prized in Asian cultures because it is thought to ward off bad luck. It is also believed to bring prosperity because its scales resembled the shape of Chinese coins. It is a freshwater fish that can grow to be three feet long.

The Platinum Arowana is a predatory fish with a strong territorial instinct. They require a lot of room. A full-grown adult requires a minimum of 250 gallons of fresh water. Due to its status as an endangered species, it is illegal to own in the United States. As a result, this is most likely a fish found only in international aquariums, and you may want to abandon your dream of owning one for yourself. It's unfortunate, but if it saves a beautiful endangered fish, it's worth it!

Price: $300,000

These stingrays in aquariums have a round body about the size of a dinner plate. Adults can reach a diameter of about 18 inches. They are blackish/brown in color with white dots on their bodies. The adults require a tank of approximately 180 gallons. The bottom of any freshwater stingray tank should be as clear as possible. This is due to the fact that stingrays tend to hover just above the ground's surface.

In the United States, the freshwater polka dot stingray is partially illegal. This is because it is listed as having insufficient data on the IUCN red list due to its limited habitat range and harsh restrictions. Some states require permits to purchase one, while others outright prohibit it. So, before you go out and buy one, make sure your neighborhood is okay with it.

Its natural habitat is the Brazilian Xingu River Basin. Freshwater Polka Dot Stingray can only be found in the wild in that location. As a result, Brazil has imposed some stringent restrictions on this fish. The freshwater polka dot stingray costs around $100,000 USD. This places them in third place on the list of the most expensive aquarium fishes.

Stingrays eat whatever fits in their mouths. So, if you have large rays, you should probably keep them separate from smaller fish. It is perfectly acceptable to keep small rays in tanks.

Price: $100,000

The peppermint angelfish is frequently referred to as the "Holy Grail" of home aquariums. It is desired by both hobbyists and serious aquarium collectors. Because of its lower price, it is more accessible to a wider range of people and aquariums.

It lives at depths of 300 feet or greater, making it difficult to catch safely. The South Pacific Ocean is its natural habitat. So far, no breeding has been successful on a large enough scale to have an impact on the availability of this fish. They grow to be about 1.5 inches long and require at least a medium-sized tank. These small fish have a much more reasonable price tag of 30,000 USD. This makes them the first fish on this list that is actually semi-affordable.

It has a beautiful red body with white stripes running vertically down the length of it. The peppermint angelfish got its name from its candy-cane coloring. It has a row of spiny-looking fins down its back and a scraggy appearance in general. In the United States, this fish is restricted but not illegal.

Angelfish, because they prefer to occupy the upper parts of a tank, make excellent tank mates. So get fish that prefer the lower tank regions to share with them.

Price: $30,000

This next fish in the list of most expensive aquarium fishes is even more affordable, costing $15,000 USD and being relatively easy to obtain. The masked angelfish is a species of marine ray-finned fish and a member of the Pomacanthidae family. The masked angelfish lives in the same depths and habitat as the peppermint angelfish. This fish, however, is less expensive as a result of aquariums' successful breeding efforts (both private and public). It can be found in the area around Hawaii, specifically the Midway and Kure Atolls.

When compared to the peppermint angelfish, this fish has a much smoother and slicker appearance. It has three colors: white, black, and yellow. The main color of its body is white, with yellow and blackish blue fins. The coloring will vary depending on the fish, but the colors will remain consistent. It will grow to be approximately 7 inches long.

Price: $15,000

Let Toplist introduce you to the bladefin basslet if you thought angelfish lived at great depths. Only submarines can collect this little beauty because it lives at depths of 800 feet. On the rare occasions when they have been apprehended, they have frequently died in transit, making those who do survive the journey extremely valuable. This raises the price of the fish.

It has a lovely orange and white pattern with thick columns of both colors alternating across its body. They live naturally in the Atlantic but are mostly found in the Caribbean. This fish costs around 8,000 USD. The long, thin fins used for swimming give these fish their name.

With their distinctive blade-like fins and eye-catching color patterns, they are difficult to distinguish from other fish in an aquarium store. However, you should not expect to see it very often. Due to their small size, basslets are generally good tank mates and will add a nice splash of color to your tank. They do not pick fights.

Price: $8,000

This is a stunning gold and white grouper. They can grow to be about a foot and a half long and are known to die on their own after being captured. These are around 7,000 USD. It can be found in coral reefs at depths ranging from 200 to 800 feet. This fish's natural habitat is the Indo-Pacific Ocean.

So, what makes this fish so unique if it can be found at depths greater than those of the Angelfish? The cost is primarily due to its scarcity. This fish is extremely rare and a hostile predator, making it difficult to keep in an aquarium. There are very few juvenile Neptune Groupers in captivity. Another young Neptune Grouper was added to the small captive population in 2012, thanks to a Singapore aquarium.

Because of its aversion to smaller fish, it is quite hostile to them. They require a large tank and will try to eat anything small and tasty in it. So don't pair it with any of your favorite fish!

Price: $7,000

The Australian Flathead Perch is a fascinating species. It has an unusual shape and a vibrant color pattern. They have a brownish/orange body with prominent blue lines running the length of them.

They also have an unusual circle on their back. It has the appearance of a peacock feather. They reach about three inches in length and are distinguished by their flat head. Only a few times have they been successfully bred in captivity.

Their natural habitat is along Australia's southern coast (remember, due to the hemisphere switch, their southern is our northern) at depths ranging from 400 feet to 600 feet. Their standard price is 4,000 USD.

These are predators, but the flathead is relatively small. So they'll be fine with the right kinds of other fish. Keep in mind that perch are aggressive fish, so if it is larger than or roughly the same size as the other fish in your tank, there will be problems.

Price: $4,000

The wrought iron butterfly fish is a butterfly fish in the Chaetodontidae family of marine ray-finned fish. It is found in the western Pacific near central and southern Japan. It's mostly metallic black with yellow margins on the dorsal, anal, and caudal fins. The body has some markings that look like a crosshatch pattern. The scales have a lattice or netted pattern with pale yellow centers and broad black margins. The largely black coloring is unusual for a butterfly fish species that is normally much more colorful. The maximum total length of this species is 15 centimeters (5.9 in).

The wrought iron butterfly fish will set you back around $4,000. At depths of about 30 feet, these fish prefer to stay close to the surface. They are very sociable fish that get along with most other species. They prefer to congregate in reefs with much other fish. They are mostly found around Japan in the Pacific Ocean.

Butterfly fish do not thrive in tanks with more than fish and live rocks. Because they like to hide, they will end up competing with almost anything else that is also hiding.

Price: $4,000

Finally, Toplist has another unusual fish: the koi. Koi fish are carp that have been bred to look a specific way. While they are technically affordable, they can also cost more than a million dollars. Their cost is determined by a variety of factors. These elements include their bloodline and skin color. The right combination of these is priceless in Japan. Koi is one of the few domesticated fish. They are ornamental fish that are mostly used to decorate tanks and ponds.

Koi is the name given to the Amur carp, but it is also used to describe the colors of koi. A koi fish can be white, orange, black, red, or gold in color. There are numerous koi species. Consider dog breeds as a good koi comparison. All dog breeds are dogs, but each breed is worth a different amount of money.

Koi are mostly peaceful freshwater fish. They will eat anything a human will eat (as will most carp). They are not your typical aquarium fish, but for the right person, they are an excellent addition and can be quite valuable. After all, each aquarium owner has their own preferences.

They are auctioned off once a year in Japan, with prices ranging from $100 to the aforementioned $1 million USD. They also don't take up much space.

A large number of koi can coexist in a small space. Each one only requires 29 gallons of water to succeed. However, because they are predators, it is not recommended that they be stored with other fish unless absolutely necessary.

Price: $100 - $1 million