Identification
A rounded dark patch at the tail base is a useful field mark. Unlike several striped relatives, this species lacks a strong dark line along the middle of the body. Its small mouth points upward, and the body is slender.
Size and Weight
Published descriptions report standard length up to 3.8 cm, about 1.5 inches, while the examined material in a major revision reached 2.8 cm. Both measurements exclude the tail fin. The larger account figure is retained with this discrepancy stated; no verified maximum individual weight was found.
Mangrove Habitat and Feeding
At Pasir Ris in Singapore, observers documented at least 15 fish holding near the surface of a mangrove stream during a falling tide. Individuals periodically moved upward to pick off food. The edible items were not identified, so the observation does not establish a detailed prey list.
Observation and Fishing Context
These dartfish can be overlooked in cloudy estuarine water. Their small size and hovering behavior make them more suitable for careful natural-history observation than a documented sport fishery. No particular hook bait or artificial lure is recommended from the evidence checked.
Holding Position as the Tide Falls
The Singapore observations show a school swimming against the current with little upstream progress, periodically darting toward food above. This is a direct glimpse of feeding behavior in a tidal setting rather than a claim that every population behaves identically.
All Lakes With Blacktail Dartfish
Browse lakes and reservoirs with documented Blacktail Dartfish records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.
No published lakes are currently linked to this species in our confirmed records.