iki jime Fish Finder
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Also known as:


Lance emperor

Longspine Emperor

Thread-fin Emperor

Common Group Name:


Family Name:


Genus Name:


Species Name:

Lethrinus genivittatus

Dispatch Method:

Beware of the very sharp dorsal and anal spines of threadfin emperors when handling them. To maximise their eating qualities they should be killed humanely by iki jime or a firm knock to the head before placing them in an ice slurry after bleeding.

Fish Description:

  • Threadfin emperors are the only Lethrinus species with a soft filament on the first dorsal spine, whilst the second dorsal spine is longest.
  • Their body color is tan or brown with scattered irregular black oblique bars along the flanks, and a prominent brown/black blotch above the pectoral fin just below the lateral line.
  • This species is a protogynous hermaphrodite which matures first as females at around 15 cm long before changing sex into male, beginning around 18 cm.
  • They are a small, relatively short lived lethrinid with a maximum age around 7 years.

Fish Distribution:

  • These fish occur throughout the tropical Indo-Pacific region from the Eastern Indian Ocean , north to Japan, and south to northern Australia.
  • They are found over coral rubble or shallow sand and seagrass beds, and may even enter rivers and mangrove areas.
  • They are aggressive feeders which eat a wide variety of
  • crustaceans and small fishes.

Fish Size Common Length:

15-20 cm, maximum size around 25 cm.