Tank Math Lab

Freshwater fish group

Anabantoids

Labyrinth fish that use surface air and usually prefer gentle flow, cover and calm companions.

10 profiles in this category. Each card uses a small directory thumbnail; open a profile for the larger reference image and full care notes.

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10 profiles shown
Male betta (Betta splendens) in an aquarium

Anabantoids

Betta (male)

Betta splendens

6 cm adult5 gal minimum

Generally peaceful, but long fins need calm tank mates. Keep one male per tank; may attack other long-finned fish.

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Dwarf gourami (Trichogaster lalius) in an aquarium

Anabantoids

Dwarf gourami

Trichogaster lalius

6 cm adult10 gal minimum

Generally peaceful in a suitable community. Males can be territorial toward each other.

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Honey gourami (Trichogaster chuna) in an aquarium

Anabantoids

Honey gourami

Trichogaster chuna

4 cm adult10 gal minimum

Generally peaceful in a suitable community. A practical community profile with adult-size guidance.

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Pearl gourami (Trichopodus leerii) in an aquarium

Anabantoids

Pearl gourami

Trichopodus leerii

11 cm adult29 gal minimum

Generally peaceful, but long fins need calm tank mates. A practical community profile with adult-size guidance.

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Croaking gourami (Trichopsis vittata) in an aquarium

Anabantoids

Croaking gourami

Trichopsis vittata

6 cm adult15 gal minimum

Generally peaceful in a suitable community. A practical community profile with adult-size guidance.

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Chocolate gourami (Sphaerichthys osphromenoides) in an aquarium

Anabantoids

Chocolate gourami

Sphaerichthys osphromenoides

6 cm adult29 gal minimum

Generally peaceful in a suitable community. Delicate and specialist; needs very soft, acidic, stable water.

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Paradise fish (Macropodus opercularis) in an aquarium

Anabantoids

Paradise fish

Macropodus opercularis

10 cm adult29 gal minimum

Territorial, especially when breeding. Can be aggressive; provide a lid and choose tank mates carefully.

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Peaceful betta (Betta imbellis) in an aquarium

Anabantoids

Peaceful betta

Betta imbellis

6 cm adult10 gal minimum

Generally peaceful, but long fins need calm tank mates. A practical community profile with adult-size guidance.

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