Firefly Betta

Betta dimidiata

Firefly Betta is a peaceful middle-to-top swimmer.

PeacefulMiddle to top swimmerIntermediate

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

Need help with Firefly Betta?

Explore compatibility, care or problems using this guide and your aquarium’s conditions.

Quick facts

Adult size: ≤ 1.8" (≤ 4.6 cm)
Aquarium size: 16 US gal (60 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length
Care level: Intermediate
Temperament: Peaceful
Swimming zone: Middle to top swimmer
Temperature: 72–81°F (22–27°C)
pH: 5.5–6.5
GH: 1–5 dGH
Diet: Omnivore
Lifespan: up to 3 years

Care requirements

Care level: Intermediate.

Lifespan: up to 3 years.

Aquarium size and space needs

Minimum aquarium size: 16 US gal (60 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length. Plan the layout and stocking within that limit.

Water parameters

Suitable water: temperature 22–27 °C, pH 5.5–6.5, GH 1–5 dGH.

Temperament and compatibility

Firefly Betta is peaceful and suits calm community fish.

Swimming zone and behavior

This fish uses the middle to upper part of the aquarium, so leave enough open swimming space for movement and feeding.

Feeding

As an omnivore, Firefly Betta should receive a varied diet rather than one repeated food type.

Offer small live and frozen invertebrates regularly and avoid large, aggressive feeding competitors.

Before adding this fish

Plan for an aquarium of 16 US gal (60 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length.
Avoid aggressive or highly competitive fish.
Offer a varied diet suited to this species’ documented feeding habits.

Natural habitat and origin

Origin: Indonesia.

Important notes

Often confused in trade with Betta krataios; use adult tail shape and provenance before applying size/group advice. Pair housing must be compatible and supervised.

Similar fish profiles

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

Batman Betta Betta persephone Same genus Same family Similar care level Intermediate ≤ 1.4" (≤ 3.5 cm) 72–82°F (22–28°C) Banded Gourami Trichogaster fasciata Same family Similar care level Same temperament Beginner – Intermediate ≤ 3.9" (≤ 10 cm) 70–82°F (21–28°C) Bleeding Blue Tetra Hyphessobrycon margitae Similar care level Same temperament Same swimming zone Beginner – Intermediate 1.6–2" (4–5 cm) 73–79°F (23–26°C) Blue Fin Hillstream Loach Gastromyzon aeroides Similar care level Same temperament Bottom dweller Beginner – Intermediate ≤ 1.8" (≤ 4.6 cm) 68–75°F (20–24°C) Bintan Licorice Gourami Parosphromenus bintan Same family Similar care level Same temperament Intermediate ≤ 1" (≤ 2.6 cm) 72–82°F (22–28°C) African Banded Barb Barbus fasciolatus Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.4" (≤ 6 cm) 68–79°F (20–26°C)

FAQ

How large does Firefly Betta get?

Firefly Betta reaches ≤ 1.8" (≤ 4.6 cm).

What aquarium size does Firefly Betta need?

Use an aquarium of at least 16 US gal (60 L) or larger / ≥ 17.7" (≥ 45 cm) minimum length.

Is Firefly Betta peaceful?

Yes. Firefly Betta is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.

What temperature is suitable for Firefly Betta?

Keep it between 22 to 27 °C.