Freshwater Fish
This small fish, about 7-8 cm long, lives in ponds and rice paddies. It is also found in the Ryukyu Islands and other areas of Japan. When breeding, the male first makes a foam nest on the surface of the water and welcomes the female. The female then lays eggs in the nest, which the male guards. During this time, there may be fierce fights with other males.
Due to their aggressive temperament, they are also known as "fighting fish." The sight of them spreading their fins and threatening each other is very beautiful, but the fish themselves are desperate.
A small fish that lives in dark caves and grows to a maximum length of about 10 cm. His eyes have degenerated and he has no vision. Instead, they have a high ability to sense the flow of water. It allows you to act.
It is characterized by its tall body and long dorsal, pelvic and anal fins. Its name comes from the way it swims beautifully like an angel with its large fins. It lives in waters with almost no current and preys on crustaceans, small fish and insects.
This fish is responsible for raising its young. It is usually gentle, but becomes aggressive after spawning. It will bite the hands of the zookeeper to protect the eggs.
A medium-sized carp native to India. It has a docile personality but is a strong swimmer and swims actively in schools. It is named after the shape of its body, which resembles a torpedo.
Depending on the light reflected, it will shine in various colors such as blue and green. Try looking for an angle that suits you.
Because they have very strong teeth, they eat mainly hard nuts that fall to the surface of the water, even though they are omnivorous fish. Although they look very similar to piranhas, this species is docile and usually lives alone.
It is a cute-looking fish with a round body shape, and has an appetite that rivals that of other larger fish.
They are well known as "doctor fish" because they attach themselves to human skin with their mouths and eat the dead skin. In Germany, fish therapy using this species is recognized as a medical procedure. They eat algae and microorganisms that grow on stones.
Sometimes I get asked, "Are you only giving them keratin?" But please rest assured that we also feed them normal food.
It is characterized by a black line running down the entire side of its body and a red line running from its head to its abdomen. Its name comes from the fact that its body shape resembles a torpedo.
Taking photos of them can be a challenge as they are constantly swimming around, so try your best to not give in to them.
A large, nocturnal tropical fish that is a member of the catfish family. It is characterized by a thick white band on its side and a reddish tail fin, from which it gets its name. In addition to fish and crabs, it also eats fruit. Its huge mouth can swallow food the same size as itself.
They generally rest at the bottom of the tank, but they often swim around during feeding time.
They live in muddy tidal flats and mangroves near river mouths. They can breathe through their skin as well as through their gills, so they often live on land. Their entire body is covered in mucus to prevent their body from drying out. On land, they move using their pectoral fins, but when startled, they may jump with their tail fin.
When I occasionally look into the tank, I see them waiting for food on driftwood, and when I put my hand in the water, they come up. Just watching them is soothing.
A Freshwater Fish that lives in rivers and lakes. Its entire body is reddish in color. As males grow, a large bump appears on their heads. It has a violent personality and may threaten other fish by butting heads. It preys on crustaceans and small fish.
Although this species has a cute little mouth, it has a bad temperament and will usually chase any new fish that come along. However, the shape of its mouth is not suited to attacking, so it has little attacking power.
One of the world's largest Freshwater Fish. Its appearance has remained almost unchanged for over 100 million years, making it known as a living fossil. The name "Pira" comes from fish and "Uruk" from the nut from which red pigment is extracted, and is derived from the red spots on the rear half of its body and tail fin. It grows to about 2-3m in length, but in the past, individuals as long as 5m have been confirmed.
This fish is famous for being one of the largest Freshwater Fish in the world. It swallows food whole with its huge mouth. The one we have at our aquarium is still small, so we're looking forward to seeing it in the future.
Although it has an image of being a dangerous fish, it rarely attacks humans, is timid, and lives in groups. It has sharp teeth and a bright red abdomen. It is carnivorous and preys on fish, insects, etc.
Although it does have a scary side, this fish is also cute when you look at it from the side with its mouth sticking out.
Apart from the head, it has almost no pigment and no scales, so its internal organs and bones can be seen through its glass-like transparent body. It is a member of the catfish family, has two long baleen, and swims in schools near the mid-level rather than the bottom. It feeds on small crustaceans and aquatic insects.
It has no scales and its transparent body allows you to see its internal organs and bones! It's a skeletal fish! Its internal organs are not visible, so its food cannot be seen through!
It lives in water areas with a lot of vegetation. It has a distinctive white and black striped pattern, and is nicknamed "tiger fish" for its appearance. It preys on small fish, crustaceans, and insects.
Many of them are timid and tend to stay in the corners of the tank. However, when it comes time to feed them, they will eat just as much as larger fish.
A large catfish. It has a long, flat body and six baleen. Its name comes from the black tiger pattern that runs from the back to the sides of its body. It preys on fish and crustaceans by sucking them in with its large mouth.
This fish is actually a little thinner in body shape, but the one we have at the museum is very greedy... so it has become a little thicker in body.
As its name suggests, it has seven black spots on its body and lives in brackish waters around mangroves and river mouths. It has the habit of shooting water from its mouth to shoot down insects and other creatures on the surface of the water.
Although they are a little timid, they have very good eyesight and will approach the front of the aquarium when they see that there is food there.
This large Freshwater Fish is said to be an ancient fish that existed over 100 million years ago. It has two barbels at the tip of its chin and a unique mouth that opens upwards to catch food on or above the water. It can also jump over one meter above the water to catch insects that have landed on tree branches.
If you look at them from above, they may mistake it for feeding time and come over. They are all quick to judge.
A type of ancient fish that has barely changed in appearance for about 100 million years. Unlike other gars, it has a short, wide snout. It is carnivorous and feeds on crustaceans and fish.
Unlike the platinum alligator gar, this is a jet black member of the gar family. Although it is small, it eats just as much food as other larger fish.
Its body is pitch black and has a knife-like shape. Its eyes are degenerate, but it can avoid obstacles and detect food by sending out a weak electric current from its body. It is nocturnal, so it often hides in the shade of rocks during the day.
A ghost-like fish that moves back and forth. If you feed it, it will come and eat it with great force! Please take a look!
An endemic species that lives in Lake Malawi in Africa. Adult males have a bright blue body color. Known as mouthbrooders, females hold the eggs in their mouths after spawning and continue to raise the young in their mouths for a while after they hatch.
Many cichlid species protect and raise their eggs and young. It's love.
When fully grown, they reach a body length of about 40 cm, which makes them large among freshwater pufferfish. They have sharp, strong teeth to eat hard shellfish, etc. They prey on small crustaceans, small fish, shellfish, etc.
When the zookeeper comes to the tank, the fish comes over to ask for food. They are a type of pufferfish with beautiful patterns on their bodies and red eyes.
When they are young, they eat moss, but as they grow up, they stop eating moss and become aggressive. Their mouths are like suckers. This species is a fixed, improved variety of the yellow algae eater, and the original species has a pale gray body color.
Its mouth is like a suction cup, and you can see it sticking to various things and wriggling around. It's unique and cute.
It has a distinctive large ring pattern and is also known as the "gold ring stingray."
These rays rarely show their undersides, so you're lucky if you get to see one!
A type of carp that can grow to over 1 meter in length. Its scales are large and copper-colored, and its fins are bluish, as its name suggests. It mainly preys on small fish, but also eats aquatic plants.
During the breeding season, carp species develop white protrusions called "stars" around their mouths, and this Blue Mahseer also has these. Please try and find them.
A large catfish, it can grow up to 2 meters and weigh up to 200 kg. It is sometimes called the "Paroon Shark" because of its shark-like body shape.
It is a member of the catfish family with a shark-like body. Personally, I think it has a cute face. I'm looking forward to watching it grow bigger.
A type of cichlid. Males develop a bump on their head as they grow. It is endemic to Lake Tanganyika in Africa and preys on small fish and crustaceans.
When viewed from the side, the large hump on the male makes this fish look very cool and impressive.
Its distinctive feature is its long lower jaw, which stretches out like an elephant's trunk. Since it has poor eyesight, it searches for food by emitting a weak electrical current from its trunk.
It looks like a nose, but if you look closely, you'll see that it's a long chin. I doubt many people would notice it at first glance. By the way, they love food, and everyone eats in a big hurry.
A member of the catfish family with a silver body and black spots. It uses its long whiskers to search for food, preying on small fish and crustaceans. It is an active swimmer, which is rare for a catfish.
They usually hide behind the rock in the center of the tank, but sometimes come out during feeding time. Even the keepers rarely get to see these fish.
This species is called the snakehead because of its snake-like face. It can breathe through gills as well as air, and periodically comes to the surface of the water to breathe air.
This fish is said to be the most beautiful of all snakehead fish! Its face seen from the front is very cute, and I think it is a fish that is both cute and beautiful.
A catfish with spines on its body. There are many variations depending on where it is produced, and each individual has different patterns and colors. It grows slowly, but it is a large catfish that can reach a maximum length of about 80 cm.
They usually stay still like a rock, but when they eat food they move around quite a bit, sucking up the food that has sunk to the bottom with great force.
A cichlid with a yellow head. In the wild, it prefers rocky areas and is said to eat leftover food and dead fish that have fallen to the bottom of the water. It is relatively docile among African cichlids, many of which have aggressive personalities.
Most of the cichlids in this aquarium are very greedy. When it's time to feed them, they all follow the staff around.
It is the largest Freshwater Fish in North America and can grow to 2-2.5m in length. Its snout protrudes like a crocodile's, and is named after its row of sharp teeth.
This fish is famous for being dangerous. Usually, its body color is gray, but this one is pure white, called platinum. It is very beautiful, but it preys on its prey with its sharp fangs.
A type of Panaque pleco. In the wild, it mainly eats rotting wood. This species is characterized by its bright green color, which is not found in other species.
Royal plecos eat wood by scraping it, so small pieces of wood will fly around in the tank they are in. Look for them peeking out from between the wood.
A type of Panaque pleco. In the wild, it mainly eats rotting wood. This species is characterized by its disordered white lines.
When Royal Plecos grow, they start to grow impressive whiskers on the sides of their mouths. However, their growth rate in an aquarium is slow, so we will have to patiently watch over them until they grow whiskers.
In its native India, it is known as the fish of the gods, and is a large species of carp that can grow to over 2m.
At first glance, their body color is rather dull, but upon closer inspection, a beautiful yellow color is beginning to emerge. When fully grown, they are as impressive to look at as arowanas and Arapaima, and are large and very cool.
It is called the Burmese upside down catfish because of the way it swims upside down. It is a medium-sized catfish that grows to a maximum of 30 cm and is quite aggressive, attacking other fish.
This strange fish swims upside down! It even eats its food upside down, so be sure to check it out!
Tetras are characterized by their light blue dorsal fin and bright red tail fin.
When it was small, it had a dull body color, but as it grew, its metallic blue body color and bright red fins developed into a beautiful color. Its body has also grown taller, giving it the charm of a small fish.
This herbivorous catfish has distinctive whisker-like protrusions on its mouth and likes to eat moss and other plants.
There are shoe-sized plecos that live in the rivers of Okinawa, but this one is a different kind of small pleco. It eats the moss in the aquarium and helps clean it.
Native to the Amazon River in South America, it was named after its disc-shaped body when viewed from the side. Its disc-shaped body is marked with vivid patterns, earning it the nickname "king of tropical fish."
Speaking of tropical fish, there's discus fish! Among them, I recommend blue ones. They have a beautiful blue color with red patterns, so please take a good look at them.
The name Convict means prisoner, and it was given this name due to its black and white striped pattern.
The two fish currently on display are a male and female pair, so they often swim together. Please take the time to observe them.
Adult males have a large, distinctive bump on their head. The name "flamingo" comes from their bright white-pink color.
Some male cichlids develop humps as they grow. The one currently on display has quite a few humps and is a very impressive looking cichlid.
A type of Cyclasoma native to Central America with a rounded head and a small mouth. The color of the body changes as it grows. It is also a more aggressive species than many other species.
This species is a member of the cichlid family that inhabits Mexico and is characterized by its flashy body color. It also has a good appetite, and when it's time to feed, it swims right up to the water level in the tank, which is very cute.
A species of Cyclasoma native to Central America, characterized by a pink head and black patterns on a bluish body. In the wild, it lives in lakes with sedimented sand and mud, and mainly eats grass, but also eats aquatic insects.
There are currently two in the tank. As you can see by comparing these two, each has a different body color, making it easy to identify them individually. In addition, while they have a rounded body, the male has a hump that makes them look cool.
It resembles the ancient fish gar, but is a completely different species, a medium-sized characin that lives in South America. It preys on small fish with its protruding mouth.
During feeding, they are greedy creatures who desperately eat food that is obviously bigger than their mouths. Their thin, pointed snouts are very cool.
A medium-sized characin native to Colombia, it has irregular black spots on its body and lives in groups in the wild.
Considering its size, it has a timid personality, and sometimes other fish steal its food during feeding. When it first came to the aquarium, it had almost no pattern, but I'm happy to see that the pattern is getting darker each day.
A medium-sized characin that lives in South America. It has a round, disc-shaped body and a line down the center of its body that becomes thicker and black as it grows.
As this species grows, parts of its body will turn red, but since it is still small, it is a fish that we look forward to watching grow.
It is found in the Amazon River basin and is locally called the Araku Flamenco. Its body is yellow with 8-12 black horizontal stripes from the snout to the tail peduncle, and it grows to about 30-35 cm in total length.
Originally, I had put komatsuna in the tank for other herbivorous fish, but this species seems to eat it with the most gusto.
A species of Cyclasoma found in Central and South America, where the patterns and sizes of males and females are different. Body color varies by region, with some individuals being deep yellow and others being deep blue.
When it was first brought in, it didn't have much color and had a modest personality. But as time passed, it's beautiful red color appeared on its abdomen and it's become more aggressive. Now it's even picking fights with fish bigger than it.
A member of the Cyclasoma family, it is tall and rounded overall. Males have a stronger yellow body color and develop humps.
It has a pretty mean personality and often picks on other fish, but it has a cute face with a slightly jutting chin.
A member of the Cyclasoma family that inhabits Central and South America. Its distinctive coloring is bright, with a yellow tail and a pink head, and it grows taller as it grows.
This colorful species has a rather poisonous appearance. I can't help but stare at it as it seems to change color a little every day.
