Siamese Fighting Fish

Betta splendens

Siamese Fighting Fish is a top swimmer.

Semi-AggressiveTop swimmerBeginner – Intermediate

Save this fish or add it directly to one of your aquariums.

Quick facts

Adult size
≤ 2.8" (≤ 7 cm)
Aquarium size
11 US gal (41 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Care level
Beginner – Intermediate
Temperament
Semi-Aggressive
Swimming zone
Top swimmer
Temperature
75–81°F (24–27°C)
pH
6.5–7.5
GH
5–20 dGH
Diet
Carnivore
Lifespan
up to 5 years

Care requirements

Care level: Beginner – Intermediate.

Lifespan: up to 5 years.

Aquarium size and space needs

Minimum aquarium size: 11 US gal (41 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length. Plan the layout and stocking within that limit.

Water parameters

Suitable water: temperature 24–27 °C, pH 6.5–7.5, GH 5–20 dGH.

Temperament and compatibility

Siamese Fighting Fish needs careful companion choice because it can be territorial or semi-aggressive.

Swimming zone and behavior

This fish uses the upper part of the aquarium, so leave enough surface space for movement and feeding.

Feeding

Use foods that suit a meatier diet and avoid combining it with fish small enough to be treated as food.

Before adding this fish

  • Plan for an aquarium of 11 US gal (41 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length.
  • Choose other fish carefully around this temperament.
  • Offer a varied diet that matches this species.

Natural habitat and origin

Origin: Cambodia, Laos, Vietnam, Thailand.

Similar fish profiles

Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.

Amazon Dwarf Cichlid Apistogramma pertensis Similar care level Same temperament Same swimming zone Intermediate ≤ 2.8" (≤ 7 cm) 72–84°F (22–29°C) American Flagfish Jordanella floridae Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 63–86°F (17–30°C) Batman Betta Betta persephone Same genus Same family Similar care level Intermediate ≤ 1.4" (≤ 3.5 cm) 72–82°F (22–28°C) Barlow’s Apistogramma Apistogramma barlowi Similar care level Same temperament Same swimming zone Intermediate ≤ 2.6" (≤ 6.5 cm) 72–84°F (22–29°C) Bintan Licorice Gourami Parosphromenus bintan Same family Similar care level Same swimming zone Intermediate ≤ 1.2" (≤ 3 cm) 72–82°F (22–28°C) African Copper Ribbon Tetra Rhabdalestes septentrionalis Similar care level Same swimming zone Similar size Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 72–82°F (22–28°C)

FAQ

How large does Siamese Fighting Fish get?

Siamese Fighting Fish reaches ≤ 2.8" (≤ 7 cm).

What aquarium size does Siamese Fighting Fish need?

Use an aquarium of at least 11 US gal (41 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length.

Is Siamese Fighting Fish peaceful?

Siamese Fighting Fish needs more careful companion choice because the temperament data points toward boundaries, space, or similar-sized fish.

What temperature is suitable for Siamese Fighting Fish?

Keep it between 24 to 27 °C.

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