Aquarium Simulator

A domesticated member of the carp family. They have round bodies, elegant fins, and come in various shapes like Oranda, Ryukin, and Ranchu. They prefer cooler water and produce a very high amount of waste, requiring excellent filtration.

A rare Japanese goldfish variant known as the 'Mackerel Tail Goldfish'. It looks similar to a Ryukin but has a single, deeply forked tail. Very active and can be kept in ponds with Koi.

Ornamental varieties of domesticated common carp. They grow massive and require deep ponds to exercise their muscles. Known as 'living jewels' in Japan.

The king of goldfish in Japan. They lack a dorsal fin and have a distinct curved back and chubby appearance. They require slow water currents and no sharp decorations.

A man-made hybrid cichlid distinguished by a prominent nuchal hump on its head and vibrant colors. Highly interactive with their owners but extremely aggressive to other fish.

A hybrid resulting from crossing a Texas Cichlid with a Red Parrot or Flowerhorn. Features a brilliant red background covered in white pearl spots. Very territorial.

A quirky hybrid with a beak-like mouth that cannot fully close. Bright red/orange in color. They act tough but their mouth shape prevents them from doing real damage.

Known as the 'King of the Aquarium', Discus are flat, disk-shaped cichlids with spectacular patterns. They require pristine water, high temperatures, and peaceful tank mates.

Elegant cichlids with laterally compressed bodies and long, flowing fins. As opportunistic ambush predators, adult angelfish will naturally eat very small fish like neon tetras.

African cichlids famous for displaying colors as vibrant as marine reef fish. They are very territorial and aggressive. Hobbyists often 'overstock' them to distribute aggression.

A beautiful but exceptionally aggressive Mbuna cichlid. Females and juveniles are yellow with black stripes, while dominant males turn dark blue/black. Requires a rock-heavy setup.

A highly colorful dwarf cichlid featuring rainbow hues and blue spangles. Peaceful enough for a community planted tank, but requires pristine, warm, acidic water.

The highly revered 'Dragon Fish'. An ancient surface-dwelling predator with large metallic scales. Needs an exceptionally large tank with a secure, heavy lid because they are powerful jumpers.

A thick-bodied ambush predator instantly recognizable by its vertical black and yellow tiger stripes. They have very large mouths and will eat anything they can swallow whole.

Apex predators with snake-like heads. They can breathe atmospheric air and survive in harsh conditions. Highly intelligent, extremely aggressive, and prone to killing tank mates.

Fascinating cartilaginous fish with a venomous tail barb. They spend their time on the bottom, requiring enormous floor space (footprint), fine sand, and zero sharp decorations.

Famous for their vibrant flowing fins and fierce male aggression. They possess a labyrinth organ to breathe air at the surface. Males must never be housed together.

Extremely hardy livebearers with colorful, fan-like tails on the males. They reproduce rapidly, so a small group can quickly become a large population if unchecked.

A tiny, vibrant schooling fish with an iridescent blue and red stripe. They look best in heavily planted tanks and must be kept in groups of at least 6 to feel secure.

Active, hardy livebearers. The males develop a distinct 'sword' extension on the lower lobe of their tail fin. They are known to jump, so a lid is recommended.

A selectively bred variation of the Molly fish with a shortened spine and inflated, balloon-like belly. They waddle when they swim and prefer slightly brackish or hard water.

A peaceful bottom-dwelling schooling fish that helps keep the substrate clean. They require fine sand to prevent damaging their delicate barbels.

A fascinating scaleless nocturnal fish that uses weak electrical signals to navigate. It lacks pelvic and dorsal fins, swimming by rippling its long anal fin. Eats small fish at night.

An ancient 'dinosaur eel' with armored scales, a lung-like organ to breathe air, and a segmented dorsal fin. They are bottom-dwelling escape artists that will eat anything they can fit in their mouth.

A beautiful, active schooling fish with bright orange and black stripes. They are famous for resting on their sides (looking like they are dead) and producing clicking sounds. Requires to be kept in groups.

A massive, highly intelligent freshwater pufferfish with an incredibly powerful bite. They are extremely aggressive and must be kept strictly alone in a large tank. Their teeth constantly grow and require hard shelled food like snails and crabs.

The iconic orange and white reef fish. They famously form symbiotic relationships with anemones. It's highly advised to only keep a single pair (two fish) per tank to avoid fatal territorial disputes.

A vibrantly blue palette surgeonfish that requires a very long tank for swimming. They are notorious for having a weak immune system against parasites like Marine Ich.

An iconic, solid bright yellow surgeonfish. They are excellent algae grazers but will violently fight other tangs of a similar body shape unless kept in a massive system.

Cheap, colorful, and incredibly hardy. However, as they mature, they become deeply territorial terrors that will harass larger, peaceful fish relentlessly.

A majestic large marine angelfish that famously changes its pattern completely from juvenile (white/blue circles) to adult (yellow/blue stripes). Needs pristine water and may nip at corals.

Distinctive for its elongated, beak-like snout used to pick small organisms from crevices. It is notoriously difficult to feed and easily stressed by aggressive tank mates.

A spectacular but venomous predator. Its ornate, feathery pectoral fins disguise highly toxic spines. They are peaceful towards large fish but will swallow anything small enough to fit in their cavernous mouths.

One of the most beautifully patterned fish in the ocean. They flutter around the rocks hunting for microscopic copepods. Will usually starve to death in new aquariums without an established pod population.