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Flagtail Dartfish (Ptereleotris uroditaenia)

Find Flagtail Dartfish across reef-livestock retailers on ReefDock. Compare sources, check known pricing where available, and review care information before you buy.

Flagtail Dartfish
Photo: (c) Andrey Ryanskiy, all rights reserved, uploaded by Andrey Ryanskiy
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Where to buy Flagtail Dartfish

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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About Flagtail Dartfish

Small, slender dart-shaped fish with a pale blue or translucent body and distinctive yellow and blue striped markings on the tail. The flaglike tail fin is deeply forked and gives the species its common name.

Key facts

Min tank size
30 gallons
Reef safety
Reef Safe
Temperament
Peaceful
Appearance
Small, slender dart-shaped fish with a pale blue or translucent body and distinctive yellow and blue striped markings on the tail. The flaglike tail fin is deeply forked and gives the species its common name.
Care Level
Moderate
Care Requirements
• 30+ gallon tank minimum, preferably 40+ gallons • Stable water: 72–78°F, pH 8.1–8.3, sg 1.020–1.025 • Requires sandy/rubble substrate for burrowing behavior • Plenty of live rock for hiding and foraging • Peaceful community; excellent for reef tanks
Difficulty Level
Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.
Feeding Schedule
2-3 times daily
Family
Microdesmidae
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Common Health Issues
Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Parasitic infestations
Diet Details
Feed small meaty foods such as copepods, amphipods, mysis shrimp, and high-quality frozen planktonic fare. Feed 2–3 times daily in small portions. They will pick at the water column but may require target feeding in larger systems.

Research before you buy

ReefDock is the sister app to Reef Trak. Use Reef Trak to research and log fish, keep tank parameters organized, and maintain a complete livestock history. Log this fish on Reef Trak.

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