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Encyclopedia / Goldfish & Coldwater / Banded sunfish
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Variations

1 kinds · tap one for a closer look

Banded sunfish

Enneacanthus obesus · Diamond sunfish

Peaceful; best in groups in planted cool tanks.

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· real AED shop prices, never conversions
9 cmAdult size ✓
10–22 °CTemperature ✓
UnknownpH ?
UnknownSmallest tank ?
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This one is best kept on its own, or with its own kind.

✕Not recommended
  • Banded sunfish needs cool water and makes a lot of waste, while Cardinal tetra is tropical.
  • They need different temperatures (10–22 °C vs 23–29 °C). No setting suits both.
✕Not recommended
  • Banded sunfish needs cool water and makes a lot of waste, while Serpae tetra is tropical.
  • Only a narrow temperature range suits both: exactly 22 °C.
✕Not recommended
  • Banded sunfish needs cool water and makes a lot of waste, while X-ray tetra is tropical.
  • They need different temperatures (10–22 °C vs 24–28 °C). No setting suits both.
Facts checked against sources on 16 Oct 2026. ✓ means a source backs it; ? means no reliable source yet. See sources

Care and water

Hardness ?Unknown
Group size ?4 or more
Temperament ?Peaceful
Swims at ?Middle
Care level ?Moderate
Diet Carnivore
Lifespan ?Unknown
Size in shops 3–6 cm
Growth Medium

Behavior

Peaceful; best in groups in planted cool tanks.

Check your local laws. Listed as threatened in New York State. Not CITES-listed. Other state rules not checked. Check the rules where you live before you buy one, and never release it into the wild.

  • cool

Food

Frozen foods, small pellets.

Tap a food to see what it is.

Male or female

MaleBrighter, bands darker
FemaleDuller
TipMales richer in colour
How hard to tellHard

Health

Common problems. Tap one to see the signs. This is a guide, not a diagnosis.

Breeding

Nest spawner · Hard

Males build and guard small nests in shallow water in spring and early summer.

Pairing

Group in spring.

Setup

Cool planted tank.

What starts it

Spring warming.

Eggs

Up to 500 eggs.

Raising the fry

Fry take infusoria.

Common mistakes
  • Warm water
Full breeding guide, day-by-day plan and simulator →

Where it lives in the wild

RegionAtlantic coastal plain of the eastern USA – New Hampshire to Florida
Rivers and lakesCoastal plain streams, ponds and bogs
HabitatAcidic, heavily vegetated ponds, bogs and swamps
Native rangeAbout 1,100 km across
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The story of the banded sunfish

Described by Girard in 1854. The smallest sunfish in New York and New Hampshire; it lives in dense weed beds and copes with very acidic water.

Charles Girard described this sunfish in 1854 as Pomotis obesus. It lives in acidic, tannin-stained waters along the Atlantic coastal plain. It is a small, peaceful sunfish kept by native-fish enthusiasts.

First described by Charles F. Girard in 1854. Named for 'obesus' means 'stout'.

  • It tolerates very acidic water.
  • Its body is marked with several dark vertical bands.
  • It usually stays under 8 cm.

Sources

12 facts checked with sources

  • Scientific name

    Described by Girard, 1854. Not the same as the blackbanded sunfish (E. chaetodon).

    FishBase: Enneacanthus obesus summary · New Hampshire Fish and Game: Banded Sunfish
  • Familycorrected

    Legacy has no family; value is new.

    FishBase: Enneacanthus obesus summary
  • Size

    TL. 3.5 in = 8.9 cm (NH Fish and Game); FishBase max 9.5 cm TL, common 6.1 cm TL; NYSDEC says they average 2 inches (5 cm). No aquarium source found; 9 cm is a maximum, typical adults are 5-6 cm.

    New Hampshire Fish and Game: Banded Sunfish · FishBase: Enneacanthus obesus summary
  • Temperaturecorrected

    FishBase value comes from the Riehl & Baensch Aquarien Atlas (Ref. 1672). Coldwater fish; no other aquarium source found.

    FishBase: Enneacanthus obesus summary
  • pH

    Conflict: FishBase 7.0-7.5 (generic aquarium atlas value) vs NH Fish and Game, which says the species lives in very acidic water (below pH 4.5). Legacy 5-7 not confirmed by a husbandry source.

    FishBase: Enneacanthus obesus summary · New Hampshire Fish and Game: Banded Sunfish
  • Hardness

    Only FishBase’s generic 8-12 dH, which does not fit an acid-water species; left unknown.

    FishBase: Enneacanthus obesus summary
  • Swimming level

    Lives in dense submerged plants; no source gives a swimming level.

    New Hampshire Fish and Game: Banded Sunfish
  • Where it livescorrectedFishBase: Enneacanthus obesus summary · New Hampshire Fish and Game: Banded Sunfish
  • BreedingNew Hampshire Fish and Game: Banded Sunfish · New York State DEC: Banded Sunfish
  • Eggs and young

    Legacy "Hundreds of eggs" fits.

    FishBase: Enneacanthus obesus summary
  • Storycorrected

    Legacy says "hardy and peaceful"; not confirmed by any source.

    FishBase: Enneacanthus obesus summary · New York State DEC: Banded Sunfish · New Hampshire Fish and Game: Banded Sunfish
  • traits.legalcorrected

    Exact New York rules on possession not read. "CITES Not Evaluated" is FishBase’s CITES field (heading and value on separate lines).

    New York State DEC: Banded Sunfish · FishBase: Enneacanthus obesus summary