Longfin Dottyback (Manonichthys polynemus)

Fish in the family Pseudochromidae. Easy care. Reef Safe.

Longfin Dottyback

Quick facts

Scientific nameManonichthys polynemus
FamilyPseudochromidae
Care levelEasy
Reef safetyReef Safe
TemperamentPeaceful
Dietcarnivore
Adult size5 in
Minimum tank size150 gallons
Water parametersTemperature: 75-80°F (24-27°C) pH: 8.0-8.4 Salinity: 1.021-1.025
Feeding scheduleFeed 2-3 times daily

Appearance

Elongated eel-like body, up to 150 cm long; yellowish brown dorsally, silver ventrally; distinctive longitudinal black lines and dark spots on flanks.

Diet and feeding

Zooplankton, small crustaceans (e.g., copepods), marine worms, and fish fry in the wild. In aquariums, brine shrimp, mysis shrimp, and various types of commercial fish foods can be offered.

Difficulty and care for the Longfin Dottyback

Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.

Common health issues

Marine ich, Fin rot, Swim bladder disorder, Bacterial septicaemia, Hole-in-the-head disease

Origin and habitat

Manonichthys polynemus is naturally found in the northwestern Pacific Ocean, specifically off the coasts of Japan, Korea, and Russia. The depth range varies from the continental shelf to the upper slope at approximately 200-1500 meters.

Log Longfin Dottyback in your reef tank

Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Longfin Dottyback alongside everything else in your reef.