Description
Xenotoca eiseni
Scientific Name: Xenotoca eiseni
Common Names: Eisen’s Livebearer, Eisen’s Goodeid
Overview
Xenotoca eiseni, commonly known as Eisen’s Livebearer or Eisen’s Goodeid, is a striking species of livebearer native to freshwater streams in Mexico. This species is known for its beautiful coloration, particularly the males, which can display vibrant colors like green, blue, and yellow with a distinctive black line running across their bodies. Unlike many other livebearers, Xenotoca eiseni is less commonly seen in hobbyist tanks, making it a unique and attractive choice for those interested in more uncommon species. These fish are peaceful and can thrive in a well-planted aquarium with suitable water conditions.
Key Information
Size: 2–3 inches (5–7.5 cm)
Lifespan: 3–5 years
Temperament: Peaceful, social
Diet: Omnivore
Swimming Level: Mid to upper
Habitat & Tank Setup
Tank Size: Minimum 20 gallons for a small group
Group Size: Best kept in groups, with a ratio of 1 male to 2–3 females
Substrate: Fine gravel or sand
Decor: Rocks, driftwood, and plenty of plants for hiding spots
Plants: Hardy plants such as Java Moss, Anubias, or Amazon Sword
Lighting: Moderate to bright
Filtration: Moderate filtration with gentle water movement
Water Parameters
Temperature: 72–78°F (22–26°C)
pH: 7.0–8.0
Hardness: Moderately hard (10–20 dGH)
Water Quality: Clean, well-oxygenated water with regular water changes
Feeding
Diet Type: Omnivore
Suitable Foods:
High-quality flakes or pellets
Frozen or live foods (brine shrimp, daphnia, bloodworms)
Vegetables such as spinach, zucchini, or peas
Feeding Frequency: 1–2 times per day, in moderate portions
Tankmates
Compatible With:
Peaceful community fish such as tetras, rasboras, and other livebearers
Peaceful bottom dwellers such as Corydoras or small loaches
Shrimp and snails
Avoid:
Aggressive fish or large species that could harm or outcompete them
Fin-nipping species
Care Notes
Breeding: Xenotoca eiseni are livebearers, meaning they give birth to live young. Provide plenty of hiding spaces and plants to protect fry.
Temperament: Generally peaceful, but males can show some territoriality, especially during breeding.
Water Quality: As with most livebearers, maintaining clean water is essential to prevent stress and disease.
Social Nature: These fish thrive in groups and do best with other peaceful species.
Fun Fact
Xenotoca eiseni is relatively rare in the aquarium trade compared to other livebearers like guppies or swordtails. Their unique appearance and peaceful nature make them an excellent addition to community tanks, especially for hobbyists looking for something a bit more unusual. The males’ vibrant colors are especially striking during breeding displays!