Butterfly Goodeid

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingAttentive tank care

  Sensitive to water quality — stay on top of testing and maintenance.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment3–5 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Swim bladder disorder

The Butterfly Goodeid (Ameca splendens) comes from a very small area of the Ameca river system in Jalisco, Mexico, and reaches about 6 to 8 cm, females larger. Its wild habitat was reduced to almost nothing and the species has spent long periods considered extinct in the wild, with the aquarium population maintained by hobbyist breeders. Goodeids differ from guppies and platies in nourishing their young internally through structures called trophotaeniae, more like a mammalian placenta than a yolk sac. A group needs 100 litres or more at 20-26C, cooler than typical tropicals, in hard alkaline water at pH 7.2 to 8.2, with good flow, oxygen and open swimming space. Feed a spirulina-rich flake or pellet with vegetable content plus frozen daphnia and brine shrimp, as it is largely herbivorous. It is hardy and easy, but it is also a nipper that will pull at long fins, so avoid guppies and bettas. Anyone with space is doing something genuinely useful by keeping and breeding a group of these.

• How active is a Butterfly Goodeid?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Butterfly Goodeid need?

  Attentive tank care. Sensitive to water quality — stay on top of testing and maintenance.

• What tank size does a Butterfly Goodeid need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Butterfly Goodeid a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Butterfly Goodeid live?

  3–5 years. Plan for a long, loving relationship.

• What health issues affect the Butterfly Goodeid?

  Keep an eye out for Ich (white spot), Fin rot, Swim bladder disorder. These are worth raising with your vet, along with any screening they recommend.

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