Dusky Millions Fish

Phalloceros caudimaculatus

Dusky Millions Fish is a peaceful all-zone swimmer.

PeacefulAll-zone swimmerIntermediate – Advanced

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Need help with Dusky Millions Fish?

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

Quick facts

Adult size: ≤ 2.8" (≤ 7 cm)
Aquarium size: 16 US gal (60 L) or larger
Care level: Intermediate – Advanced
Temperament: Peaceful
Swimming zone: All-zone swimmer
Temperature: 61–72°F (16–22°C)
pH: 7–8
GH: 5–25 dGH
Diet: Omnivore
Lifespan: up to 2 years

Care requirements

Care level: Intermediate – Advanced.

Lifespan: up to 2 years.

Aquarium size and space needs

Minimum aquarium size: 16 US gal (60 L) or larger. Plan the layout and stocking within that limit.

Water parameters

Suitable water: temperature 16–22 °C, pH 7–8, GH 5–25 dGH.

Temperament and compatibility

Dusky Millions Fish is peaceful and suits calm community fish.

Swimming zone and behavior

This fish uses multiple areas of the aquarium, so leave enough open swimming space for movement and feeding.

Feeding

As an omnivore, Dusky Millions Fish should receive a varied diet rather than one repeated food type.

Before adding this fish

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

Natural habitat and origin

Origin: Brazil, Argentina, Uruguay, Paraguay.

Important notes

Livebearing population can expand quickly; male pursuit and female refuge matter. Short-term natural brackish occurrence is not a long-term salt requirement.

Similar fish profiles

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

Black-Bellied Limia Limia melanogaster Same family Similar care level Same temperament Beginner – Intermediate ≤ 2" (≤ 5 cm) 72–82°F (22–28°C) Agassizs Corydoras Brochis agassizii Similar care level Same temperament Bottom dweller Intermediate ≤ 2.8" (≤ 7 cm) 72–81°F (22–27°C) Blackline Tail Tetra Moenkhausia costae Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 72–79°F (22–26°C) Blacktop Corydoras Corydoras acutus Similar care level Same temperament Bottom dweller Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 72–82°F (22–28°C) Blue Panchax Aplocheilus panchax Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 68–79°F (20–26°C) Anus Spot Lampeye Killifish Poropanchax stigmatopygus Same family Similar care level Same temperament Intermediate ≤ 0.9" (≤ 2.4 cm) 72–79°F (22–26°C)

FAQ

How large does Dusky Millions Fish get?

Dusky Millions Fish reaches ≤ 2.8" (≤ 7 cm).

What aquarium size does Dusky Millions Fish need?

Use an aquarium of at least 16 US gal (60 L) or larger.

Is Dusky Millions Fish peaceful?

Yes. Dusky Millions Fish 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 Dusky Millions Fish?

Keep it between 16 to 22 °C.