Dusky Millions Fish Care Guide
Phalloceros caudimaculatus · Freshwater Fish
What Dusky Millions Fish look like
Phalloceros caudimaculatus, commonly known as the Dusky Millions Fish, exhibits a small, laterally compressed body that typically reaches a maximum adult size of 2.5 inches (6.35 cm). The species displays sexual dimorphism, with males being smaller and possessing a modified anal fin known as a gonopodium, which is adapted for internal fertilization. The coloration is predominantly golden-olive, adorned with a distinctive pattern of dark spots scattered across the flanks, providing effective camouflage in its natural habitat. Notable morphological features include a well-developed lateral line system, which aids in detecting water movements, and a small dorsal fin positioned towards the rear of the body. The species lacks significant defensive adaptations, relying instead on its small size and coloration to evade predators.
Behavior & temperament
Dusky Millions Fish are generally social and can be found in small groups, although they do not exhibit strict schooling behavior. They inhabit the mid to upper water column, often dwelling in shallow, vegetated areas of freshwater environments. Breeding occurs through live-bearing, with females giving birth to fully formed fry, and they exhibit a degree of parental care. The species is known for its relatively peaceful temperament, although males can display territorial aggression during breeding seasons, particularly towards one another.
Diet & feeding
In the wild, the Dusky Millions Fish is an omnivore, feeding on a varied diet that includes small invertebrates, algae, and detritus. In captivity, they thrive on a balanced diet of high-quality flake food, supplemented with live or frozen foods such as brine shrimp and daphnia to ensure optimal health.
Behind the name
Phalloceros (from Greek 'phallos' meaning 'penis' and 'keras' meaning 'horn'); caudimaculatus (from Latin 'cauda' meaning 'tail' and 'maculatus' meaning 'spotted').
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Dusky Millions Fish?
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