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Longfin Dottyback (Manonichthys polynemus)

Find Longfin Dottyback across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Longfin Dottyback
Photo: (c) Mark Rosenstein, some rights reserved (CC BY-NC), uploaded by Mark Rosenstein · cc-by-nc
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Where to buy Longfin Dottyback

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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  • Petco

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    Search Petco

About Longfin Dottyback

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

Key facts

Diet Details
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.
Reef safety
Reef Safe
Origin
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.
Common Health Issues
Marine ich, Fin rot, Swim bladder disorder, Bacterial septicaemia, Hole-in-the-head disease
Appearance
Elongated eel-like body, up to 150 cm long; yellowish brown dorsally, silver ventrally; distinctive longitudinal black lines and dark spots on flanks.
Temperament
Peaceful
Min tank size
150 gallons
Difficulty Level
Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.
Care Level
Easy
Family
Pseudochromidae
Water Parameters
Temperature: 75-80°F (24-27°C) pH: 8.0-8.4 Salinity: 1.021-1.025
Diet
carnivore

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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