Redtail Splitfin Goodeid
Xenotoca doadrioi
Redtail Splitfin Goodeid (Xenotoca doadrioi) is a freshwater fish that suits calm freshwater aquariums. Its adult size of up to 5 cm should still be matched with stable water and compatible fish.
Quick facts
- Adult size
- up to 5 cm
- Aquarium size
- 120 L or larger
- Care level
- Beginner – Intermediate
- Temperament
- Semi-Aggressive
- Temperature
- 12–25 °C
- pH
- 6.5–8
- GH
- 5–20 dGH
- Diet
- Omnivore
- Lifespan
- up to 3 years
- Group behavior
- Yes; 2 Females per Male
Overview
Redtail Splitfin Goodeid (Xenotoca doadrioi) is a freshwater aquarium fish for aquariums where the layout leaves enough swimming room and the water stays stable.
Use these values as planning checks, then make sure the aquarium still has room for behavior, group needs, and calm community fish.
Care requirements
With a Beginner – Intermediate care level, Redtail Splitfin Goodeid is approachable, but it still needs stable water, clean substrate, and a well-planned stocking group.
With a lifespan of up to 3 years, this is a fish to plan for long term rather than an impulse addition.
Aquarium size and space needs
An aquarium of 120 L or larger can be a reasonable starting point, but it should not be read as permission to overstock.
At up to 5 cm, Redtail Splitfin Goodeid stays small, but it still needs room to move, feed, and avoid constant competition.
Water parameters
The temperature range for this fish is 12 to 25 °C, which fits many tropical freshwater aquariums. Choose other fish with overlapping temperature needs.
The pH range for this fish is 6.5 to 8. That points to a broad freshwater range, but stability is more important than sudden corrections.
The GH range for this fish is 5 to 20 dGH. That gives some flexibility, but sudden changes are usually more stressful than a stable value that is slightly imperfect.
Temperament and compatibility
Redtail Splitfin Goodeid needs more careful companion choice because the temperament data suggests space, boundaries, or similar-sized fish may matter.
Feeding
As an omnivore, Redtail Splitfin Goodeid should receive a varied diet rather than one repeated food type.
Natural habitat and origin
This profile currently lists the origin as Mexico. Treat this as a broad regional note rather than a complete habitat description.
Before adding this fish
Use this checklist before treating the profile as a match for an existing aquarium.
- Plan for an aquarium of 120 L or larger.
- Choose other fish with overlapping temperature needs.
- Keep pH stable within the listed range instead of making sudden corrections.
- Choose other fish carefully around this temperament.
- Offer a varied diet that matches this species.
Similar fish profiles
Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.
FAQ
How large does Redtail Splitfin Goodeid get?
Redtail Splitfin Goodeid reaches up to 5 cm according to this profile. It stays relatively small, but aquarium planning should still account for swimming room.
What aquarium size does Redtail Splitfin Goodeid need?
Plan for an aquarium of 120 L or larger. Treat this as a baseline, because fish also need suitable swimming room and compatible fish.
Is Redtail Splitfin Goodeid peaceful?
Redtail Splitfin Goodeid needs more careful companion choice because the temperament data points toward boundaries, space, or similar-sized fish.
What temperature is suitable for Redtail Splitfin Goodeid?
The temperature range for this fish is 12 to 25 °C. Choose other fish with overlapping temperature needs and avoid sudden temperature swings.