Care and Compatibility of Otocinclus Catfish - Otocinclus Affinis


Introduction

The Otocinclus Catfish, scientifically known as Otocinclus affinis, is a small freshwater fish native to South America. They have an elongated and laterally flattened body, with a base coloration of shades of gray and brown. Their distinctive features are their large eyes and a suction cup-like mouth that they use to cling to surfaces and feed on algae and microorganisms.

Behavior

The Otocinclus Catfish is a peaceful and sociable fish that adapts well to community aquariums. They are known for their calm behavior and their fondness for eating algae. They are schooling fish, and it is recommended to keep them in groups of at least six individuals to ensure they feel secure and exhibit their natural behavior. They enjoy exploring the substrate in search of algae and leftover food. They are an excellent addition to planted aquariums and help maintain a balance in algae growth.

Sexual Dimorphism

Sexual dimorphism in Otocinclus affinis is minimal and difficult to distinguish. Both males and females have a similar appearance.

Reproduction

Breeding the Otocinclus Catfish is a challenging process in the aquarium environment and is not common in most cases. They are egg-layers, and the female will deposit her eggs on plants or other substrates. The parents do not care for the fry, so it is recommended to remove the eggs after spawning and place them in a separate breeding tank. The fry will hatch after a few days and can be fed with powdered fry food and microscopic organisms.

Aquarium Conditions

Otocinclus affinis, commonly known as otocinclus catfish, requires a well-established aquarium with abundant vegetation and hiding places. It prefers neutral to slightly acidic water. Aquarium décor should include hardy plants and soft substrates. Maintaining water quality is crucial and providing a proper diet.

Feeding

The Otocinclus Catfish is primarily herbivorous and feeds on algae and microorganisms found in the aquarium. They are excellent algae eaters and help maintain a healthy environment. However, in case of algae scarcity, supplementary foods such as vegetable tablets or frozen foods like spirulina can be offered. It is important to provide them with a balanced and varied diet to ensure their health and well-being.

Complexity

Caring for Otocinclus affinis can be moderately challenging. They are peaceful and shy fish that need a stable and well-maintained aquarium. They are sensitive to sudden changes in water quality. They mainly feed on algae and require a balanced diet to maintain their health.


In case you need more help, or if you want to know into any topic related to the Otocinclus Affinis (Otocinclus Catfish) and even any other species you can use the forums to ask what you need.

To do an analysis more detailed about coexistence and behavior of Otocinclus Affinis (Otocinclus Catfish) use the Aquarium simulation tool, if you do this you can test different ways to combine the Otocinclus Catfish with other fishes giving the dimensions and space on you aquarium, on this way you can known the optimal configuration for keep the fishes that you want.

You can also find out the 112 species compatible with the Otocinclus Affinis (Otocinclus Catfish) can live together.

Note: The parameters of the water such as PH and temperature are also used to calculate the compatibility of the species.


Compatible species (112)

Compatible (78 Species)

Compatible without any restriction


Veil tail Goldfish - Carassius auratus I

Veil tail Goldfish

Carassius auratus I

Telescope goldfish - Carassius auratus II

Telescope goldfish

Carassius auratus II

Comet Goldfish - Carassius auratus III

Comet Goldfish

Carassius auratus III

Striped Raphael Catfish - Platydoras costatus

Striped Raphael Catfish

Platydoras costatus

Golden Royal Pleco - Sturisoma aureum

Golden Royal Pleco

Sturisoma aureum

Celestial eye goldfish - Carassius auratus V

Celestial eye goldfish

Carassius auratus V

Freshwater angelfish - Pterophyllum scalare

Freshwater angelfish

Pterophyllum scalare

Coolie loach - Pangio kuhlii

Coolie loach

Pangio kuhlii

Swordtail fish - Xiphophorus hellerii

Swordtail fish

Xiphophorus hellerii

Pearl gourami - Trichogaster leerii

Pearl gourami

Trichogaster leerii

Molly fish - Poecilia sphenops

Molly fish

Poecilia sphenops

Butterfly Loach - Beaufortia leveretti

Butterfly Loach

Beaufortia leveretti

Yoyo Loach - Botia almorhae

Yoyo Loach

Botia almorhae

Guppy fish - Poecilia reticulata

Guppy fish

Poecilia reticulata

Tiger Barb - Puntius tetrazona

Tiger Barb

Puntius tetrazona

German Blue Ram - Microgeophagus ramirezi

German Blue Ram

Microgeophagus ramirezi

Bleeding Heart Tetra - Hyphessobrycon erythrostigma

Bleeding Heart Tetra

Hyphessobrycon erythrostigma

Hatchet Fish - Thoracocharax stellatus

Hatchet Fish

Thoracocharax stellatus

Glassy Perchlet - Parambassis ranga

Glassy Perchlet

Parambassis ranga

Platy Fish - Xiphophorus maculatus

Platy Fish

Xiphophorus maculatus

Red-eyed Tetra - Moenkhausia sanctaefilomenae

Red-eyed Tetra

Moenkhausia sanctaefilomenae

Female Siamese Fighting Fish - Betta Splendens Female

Female Siamese Fighting Fish

Betta Splendens Female

Dwarf Gourami - Colisa lalia

Dwarf Gourami

Colisa lalia

Zebrafish - Danio rerio

Zebrafish

Danio rerio

Black Skirt Tetra - Gymnocorymbus ternetzi

Black Skirt Tetra

Gymnocorymbus ternetzi

Chinese Neon Tetra - Tanichthys albonubes

Chinese Neon Tetra

Tanichthys albonubes

Glowlight Tetra - Hemigrammus Erythrozonus

Glowlight Tetra

Hemigrammus Erythrozonus

Black Neon Tetra - Hyphessobrycon herbertaxelrodi

Black Neon Tetra

Hyphessobrycon herbertaxelrodi

Neon tetra fish - Paracheirodon innesi

Neon tetra fish

Paracheirodon innesi

Galaxy Rasbora - Danio margaritatus

Galaxy Rasbora

Danio margaritatus

Ember Tetra - Hemigrammus Rhodostomus

Ember Tetra

Hemigrammus Rhodostomus

Harlequin Rasbora - Trigonostigma Heteromorpha

Harlequin Rasbora

Trigonostigma Heteromorpha

Serpae Tetra - Hyphessobrycon Eques

Serpae Tetra

Hyphessobrycon Eques

Apple Snail - Pomacea bridgesii

Apple Snail

Pomacea bridgesii

Emperor Tetra - Nematobrycon Palmeri

Emperor Tetra

Nematobrycon Palmeri

Goldeneye Dwarf Cichlid - Nannacara anomala

Goldeneye Dwarf Cichlid

Nannacara anomala

Ember Tetra - Hyphessobrycon Amandae

Ember Tetra

Hyphessobrycon Amandae

Ruby Tetra - Axelrodia riesei

Ruby Tetra

Axelrodia riesei

Green Neon Tetra - Paracheirodon Simulans

Green Neon Tetra

Paracheirodon Simulans

Three lined Pencilfish - Nannostomus Trifasciatus

Three lined Pencilfish

Nannostomus Trifasciatus

Glass Catfish - Kryptopterus bicirrhis

Glass Catfish

Kryptopterus bicirrhis

Boraras Brigittae Fish - Boraras Brigittae

Boraras Brigittae Fish

Boraras Brigittae

Cherry Barb - Barbus titteya

Cherry Barb

Barbus titteya

Filamented Rainbowfish - Iriatherina Werneri

Filamented Rainbowfish

Iriatherina Werneri

Endler Guppy Fish - Poecilia Wingei

Endler Guppy Fish

Poecilia Wingei

Caridina Shrimp - Caridina cf. Cantonensis

Caridina Shrimp

Caridina cf. Cantonensis

Black Phantom Tetra - Hyphessobrycon Megalopterus

Black Phantom Tetra

Hyphessobrycon Megalopterus

Upside-Down Catfish - Synodontis nigriventris

Upside-Down Catfish

Synodontis nigriventris

Espei Rasbora - Trigonostigma espei

Espei Rasbora

Trigonostigma espei

Forktail Blue-Eye - Pseudomugil furcatus

Forktail Blue-Eye

Pseudomugil furcatus

Blue-Eyed Pseudomugil - Pseudomugil paskai

Blue-Eyed Pseudomugil

Pseudomugil paskai

Cockatoo Dwarf Cichlid - Apistogramma viejita

Cockatoo Dwarf Cichlid

Apistogramma viejita

Nerite Snail - Neritina sp

Nerite Snail

Neritina sp

Clown Pleco - Panaqolus maccus

Clown Pleco

Panaqolus maccus

Pictus Catfish - Pimelodus pictus

Pictus Catfish

Pimelodus pictus

Royal Pleco - Panaque nigrolineatus

Royal Pleco

Panaque nigrolineatus

Congo Tetra - Phenacogrammus interruptus

Congo Tetra

Phenacogrammus interruptus

Lacustris Rainbowfish - Melanotaenia lacustris

Lacustris Rainbowfish

Melanotaenia lacustris

Dwarf Tetra - Hasemania nana

Dwarf Tetra

Hasemania nana

Preacox Rainbowfish - Melanotaenia preacox

Preacox Rainbowfish

Melanotaenia preacox

Semifasciolatus Barb - Puntius semifasciolatus

Semifasciolatus Barb

Puntius semifasciolatus

Moenkhausia Pittieri - Moenkhausia pittieri

Moenkhausia Pittieri

Moenkhausia pittieri

Stiphodon Ornatus - Stiphodon ornatus

Stiphodon Ornatus

Stiphodon ornatus

Anentome Helena - Anentome helena

Anentome Helena

Anentome helena

IndoPlanorbis Exustus - Planorbis planorbis

IndoPlanorbis Exustus

Planorbis planorbis

Horned Snail - Tyloperlamania sp

Horned Snail

Tyloperlamania sp

Red Cherry - Neocaridina davidi

Red Cherry

Neocaridina davidi

Amano Shrimp - Caridina multidentata

Amano Shrimp

Caridina multidentata

Blue Bee Shrimp - Paracaridina sp

Blue Bee Shrimp

Paracaridina sp

Bamboo Shrimp - Atyopsis moluccensis

Bamboo Shrimp

Atyopsis moluccensis

Florida Dwarf Crayfish - Cambarellus diminutus

Florida Dwarf Crayfish

Cambarellus diminutus

Red-Backed Tetra - Hyphessobrycon bentosi

Red-Backed Tetra

Hyphessobrycon bentosi

Spotted Dora Catfish - Agamyxus pectinifrons

Spotted Dora Catfish

Agamyxus pectinifrons

Lemon Tetra - Hyphessobrycon pulchripinnis

Lemon Tetra

Hyphessobrycon pulchripinnis

se recomienda tener varios ejemplares de su misma especie viviendo juntos.


Otocinclus Catfish - Otocinclus Affinis

Otocinclus Catfish

Otocinclus Affinis

Similar Sizes (1 Species)

They can coexist if they are the same size or very similar sizes, it does not work in all cases, there may be exceptions.


Clown Loach - Chromobotia macracanthus

Clown Loach

Chromobotia macracanthus

With Reservation (4 Species)

Compatible in some cases, it depends on the nature and personality of the fish.


Siamese Algae Eater - Crossocheilus Siamensis

Siamese Algae Eater

Crossocheilus Siamensis

Paradise Fish - Macropodus Opercularis

Paradise Fish

Macropodus Opercularis

It is probable that the Betta attack the otocinclus, especially in the tail fin however it depends more on the personality of the betta fish.


Male siamese fighting fish - betta splendens male

Male siamese fighting fish

betta splendens male

Showdown over territory (4 Species)

Fish can live together as long as the space is spacious enough to delimit a territory, otherwise there may be aggressions for competing for the territory.


Leopard Cactus Pleco - Hypancistrus Furunculus L199

Leopard Cactus Pleco

Hypancistrus Furunculus L199

Dwarf marbled catfish - Microglanis poecilus

Dwarf marbled catfish

Microglanis poecilus

Kribensis Cichlid - Pelvicachromis pulcher

Kribensis Cichlid

Pelvicachromis pulcher

Como a estos peces les gusta estar refugiados en diferentes ubicaciones del acuario ya sean en plantas, troncos, rocas etc, si otro pez intenta entrar donde está escondido podrían haber confrontaciones por ese refugio.


Dragon Violet Goby - Gobioides broussonnetii

Dragon Violet Goby

Gobioides broussonnetii

Considerable size difference (23 Species)

They can coexist while they are similar in size or the size difference is not very abysmal, since as the fish grows it increases the chances of eating its partner that did not grow much.


Suckermouth catfish - Hypostomus plecostomus

Suckermouth catfish

Hypostomus plecostomus

Sun Catfish - Horabagrus brachysoma

Sun Catfish

Horabagrus brachysoma

Galaxy Plecostomus - Leporacanthicus sp L240

Galaxy Plecostomus

Leporacanthicus sp L240

Discus fish - Symphysodon aequifasciatus

Discus fish

Symphysodon aequifasciatus

False Discus - Heros severus

False Discus

Heros severus

Electric Blue Cichlid - Andinoacara pulcher

Electric Blue Cichlid

Andinoacara pulcher

Tetraodon Nigroviridis - Tetraodon Nigroviridis

Tetraodon Nigroviridis

Tetraodon Nigroviridis

Severum Cichlid - Heros efasciatus

Severum Cichlid

Heros efasciatus

Convict Cichlid - Amatitlania nigrofasciata

Convict Cichlid

Amatitlania nigrofasciata

Firemouth Cichlid - Cichlasoma meeki

Firemouth Cichlid

Cichlasoma meeki

Silver Dollar Fish - Metynnis argenteus

Silver Dollar Fish

Metynnis argenteus

Kissing Gourami - Helostoma temminckii

Kissing Gourami

Helostoma temminckii

Boeseman's Rainbowfish - Melanotaenia Boesemani

Boeseman's Rainbowfish

Melanotaenia Boesemani

Red Terror Fish - Mesoheros festae

Red Terror Fish

Mesoheros festae

Denison Barb - Puntius denisonii

Denison Barb

Puntius denisonii

Lemon Catfish - Hemiancistrus subviridis

Lemon Catfish

Hemiancistrus subviridis

Flag Cichlid - Mesonauta festivus

Flag Cichlid

Mesonauta festivus

Empire Gudgeon - Hypseleotris compressa

Empire Gudgeon

Hypseleotris compressa

Archerfish - Toxotes jaculatrix

Archerfish

Toxotes jaculatrix

Mije Fish - Leporinus fasciatus

Mije Fish

Leporinus fasciatus

Stick Catfish - Farlowella acus

Stick Catfish

Farlowella acus

Red Rainbowfish - Glossolepis incisus

Red Rainbowfish

Glossolepis incisus

Altum Angelfish - Pterophyllum altum

Altum Angelfish

Pterophyllum altum

Compatible if space is enough (2 Species)

They can coexist together if the aquarium they share is large and spacious enough for both species to feel good, as some fish may attack others to feel that they have little space and try to eliminate the competition.


Wasp Goby - Brachygobius Xanthozona

Wasp Goby

Brachygobius Xanthozona

Multis Fish - Neolamprologus multifasciatus

Multis Fish

Neolamprologus multifasciatus

Otocinclus Catfish

Otocinclus Affinis

Otocinclus Catfish - Otocinclus Affinis
  • Ph: 5.5 - 7.6
  • Temperature (c°): 22 - 26
  • Measures: 4 cm - 5cm
  • Aquarium Capacity:
    8 Liters - 2 Gallons
  • Behavior: Likes to take refuge, Night, Peaceful
  • Size: Very small
  • Swimming area: Aquarium background
  • Water Type: Sweet water