Espécies de peixes

The right fish for your aquarium

From the over 30,000 fish species of the world in fresh and marine water only a tiny part is regularly kept in aquariums. Since an animal species has never been wiped out by pet keeping and not even the world’s most caught aquarium fish, the cardinal tetra, has ever been endangered in its stock by its millionfold capture (stock figures in nature unchanged for decades), we shouldn’t feel guilty about keeping fish in aquariums. More and more fish and invertebrate species have been bred, so that there is no need to remove them from their natural habitats. Unfortunately some fish species exist only in aquariums because their natural habitats have been destroyed. In such cases catching aquarium fish can count as active nature conservation, because the fish catchers are helping fishing areas (i.e the habitats) remain intact to secure their livelihood!

We aquarists divide fish in three main groups: freshwater fish, marine fish and brackish water fish, which live in freshwater and marine water biotopes, as well as in the regions in between.

Which fish fit into my aquarium?

Fish communities in the aquarium: Which aquarium fish do NOT go together and why? Which criteria should you follow when selecting fish? What demands do aquarium fish make on your aquarium and how high maintenance are they? We explain which fish go together and why certain fish species do not.

The selection

When selecting your aquarium stock please take the following points into account for each fish species:

Fish size

Is your aquarium large enough? Some sucker catfish (as an example) can become 30 cm long! Are the fish sizes of different species compatible or does one species regard another one as food?

Behaviour

Highly active fish (e.g. rainbow fish) need a lot of space and long aquariums. High-backed fish (e.g. angel fish) need high aquariums.

Way of life

Do your fish (a lot of cichlids, as an example) need hiding places? Do they need wood (as many sucker catfish)? Do they dig and need soft soil (e.g. armoured catfish, loaches)?

Aggressiveness

Are the fish territory-forming (as are many cichlids)? Do you need to keep them in pairs, in a harem or in a shoal? How well can the fish be socialised with your other fish species?

Food

Do the fish need highly specialised food (e.g. puffer fish often eat ONLY snails)?

Plantas

Are they plant-eating fish (e.g. long-whiskered cat fish, Leporinus tetras)?

Água

Do the fish have special demands on the water quality (e.g. discus fish prefer pH values below 7.0)?

Aquarium design

Do you need to fully cover the aquarium because your fish like jumping?

The most important orders and families in freshwater aquatics

Of course, there are still more families and orders, such as armed spiny eels, Asiatic glassfishes, snakeheads, gobies etc. If you decide to keep one of these fish, please find out what demands the animals have on aquarium size, water, socialisation and food.

Ciprinídeos

The cyprinids include some very popular aquarium fish, such as barbels, danionins, koi (pond fish), red-tailed black sharks, white cloud mountain minnows and also the sucking loaches.

We can’t give you any general tips because the demands of the individual families or species vary widely. There are species like the red-tailed black shark which prefer individual keeping or shoal fish, such as most barbels and danionins.

Cobitídeos

Loaches are very active fish which are kept individually or in shoals.

Many loaches are excellent snail eaters. Since they love to dig in the soil (grubbing) you must not use sharp-edged substrates. Ideal is JBL Sansibar RIVER .

Tetras

The tetra group includes small peaceful representations, such as the neon tetra, as well as large carnivores like the piranha.

Most tetras are shoal fish and should be kept in groups of 10 minimum. Three fish do NOT make a shoal!

Catfish

This order includes huge predatory catfishes, as well as small popular species, such as armoured catfish or dwarf suckers.

Please don’t use sharp-edged substrates for grubbing species like armoured catfish but ideally sand, such as JBL Sansibar RIVER .

Some sucker catfish need wood to help their digestion.

For these species you need mangrove or bog wood in your aquarium and special food tablets ( JBL PRONOVO PLECO WAFER M ).

Peixes arco íris

These magnificent and lively fish from Australia are shoal fish which need a lot of space for swimming.

These magnificent and lively fish from Australia are shoal fish which need a lot of space for swimming.

Livebearing tooth carps

The most popular ornamental fish at all, such as the guppies, platties and black molly fish belong to the viviparous tooth carps.

Unlike the egg-laying tooth carps they have living babies. Male animals pursue the females aggressively and a harem of females is therefore needed. Note: This great enthusiasm for reproduction means your aquarium dwellers will increase rapidly in number!

Egg-laying tooth carps

A lot of egg-laying tooth carps have incredibly beautiful colours and don’t become large!

Unfortunately they don’t live very long, but is not very difficult to breed them. They often have certain demands on the water quality (hardness, pH value) which also ought to be followed. They love densely planted aquariums.

Ciclídeos

The cichlidae family (cichlids) include totally different types of fish: peaceful small dwarf cichlids, high-backed angel fish, high maintenance discus fish, undemanding zebra cichlids, mouth brooding forms from Lake Malawi and Lake Tanganyika and very large growing predators like the velvet cichlid.

Almost all species are territory-forming and defend their territories against their own species, often also against other fish. It is interesting to observe the way cichlids care for their brood, but their aggressiveness can make them difficult to keep.

Peixes-labirinto

Since many labyrinth fish live in hot, low-oxygen water they have developed an additional respiratory organ, which is called labyrinth.

They are very interesting and colourful fish of which many species build floating foam nests.

Tetraodontídeos

These must be the cutest aquarium dwellers of all!

They are often employed as effective snail eaters. But if they have no snails to eat anymore, they quickly get bored and bite other fish. Many species need a bit of sea salt with increasing age because in their natural habitat they live in brackish water. Some species can ONLY be fed with snails! Often blowfish learn from other socialised fish that granulate or live food can also be quite tasty and start to eat this food, which they would probably not do if they were kept in isolation.

Further species

Of course, there are still more families and orders, such as armed spiny eels, Asiatic glassfishes, snakeheads, gobies etc.

If you decide to keep one of these fish, please find out what demands the animals have on aquarium size, water, socialisation and food.

Brackish water fish

Brackish water fish live in the area between marine water and freshwater. The salinity of the water is therefore a value between that of marine water and freshwater. Although the animals tolerate both extremes (marine water/freshwater) they mostly feel more comfortable in midrange values in the long run. Some species migrate from marine water to freshwater and the other way round. Keeping aquarium plants is impossible because of the salinity. Only mangroves tolerate the required and fluctuating salt concentrations. Fish in brackish water have quite special needs and should only be kept by experienced aquarium owners.

Scats

Juveniles and middle-sized animals don’t like freshwater and need to be kept in brackish water.

Adult scats prefer pure marine water. Scats like to live in groups and are omnivores. They like JBL PlanktonPur SMALL , JBL Krill , JBL Maris und also JBL MariPearls . Most freshwater are suitable, too.

Monos

Juveniles and especially adult fish require brackish water, but can also be kept in pure marine water.

Monos like to eat smaller animals and like JBL PlanktonPur SMALL , JBL Krill , frozen food and live food, such as large Artemia and Mysis. Take care not to select too large food.

Mudskippers

Since mudskippers spend a lot of time outside of the water, a large land part with soft substrate is required.

Recommended substrates are JBL Sansibar WHITE or JBL Sansibar NEVE .

Roots protruding above the water are also welcome. It is important that there is warm air (26-30°C) and the water temperature is between 26 and 28 °C. The salinity may fluctuate, but shouldn’t drop to freshwater level for too long. Although mudskippers prefer live food (including house crickets and worms), they also learn to eat frozen food and dry food ( JBL Krill , JBL NovoArtemio ).

(Many) puffer fish

Puffer fish can attain many different sizes but most species need brackish water or marine water.

Only very few species tolerate pure freshwater. Socialisation with other fish may be a problem. Regarding food, they are definitely a bit choosy: live food and snails are first priority for them. Substitute food is difficult, but not impossible. After a learning phase, food tablets attached to the pane ( JBL NovoTab ) are also readily eaten. But you need to feed them snails at regular intervals to wear down their teeth.

Banded archerfish

Only very few banded archerfish species can be found in pure freshwater.

All others are brackish water dwellers. They live in small groups and are exclusively carnivorous (predatory). Food: Insects (on the water surface or in the land part above the water part), small fish and, once accustomed, other live foods also. Try to drop the food on the water surface. Archerfish will often accept food as long as it is freshly dropped or moving due to current.

Four-eyed fish

Absolutely fascinating surface dwellers that can see sharply both above and below water at the same time.

Absolutely fascinating surface dwellers that can see sharply both above and below water at the same time. They need a shallow aquarium with high humidity in the air. For specialists only.

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