Red bassLJB

 
Lutjanus bohar
31.1 cm TL

Characteristic features:

  • Longitudinal scale rows above lateral line obliquely positioned
  • Vomerine tooth patch lacking posterior extension
  • Preopercular notch indistinct
  • Nostrils set in a prominent groove

Colour:

Dark brownish red, most fish with dark-edged fins.

Size:

Up to 75 cm TL.

Distribution:

Indo-West Pacific in tropical waters.

Habitat:

Coral reefs, sheltered lagoons and outer reefs, from 5 to at least 150 m depth.

Biology:

Feeds primarily on fish, but also on crustaceans, cephalopods and other molluscs. Red bass are usually solitary, but are occasionally found in groups. A slow growing species, in waters of Papua New Guinea first maturity of females was observed at 37 cm FL, with most females mature at 45.0 cm FL.1 On the Great Barrier Reef, females were found to mature at a much later age and larger size than males, with 50% of individuals reaching maturity at 42.8 cm, and 30.0 cm for females and males, respectively. This corresponds to 9.39 years and 1.46 years for females and males, respectively.2 Spawning has been observed to occur in most months of the year.2 Red bass are a long lived species, however maximum age estimates vary from 38 to 55 years.2 The variation in age estimates thought to be due to sampling at different depth ranges, suggesting older bass occur at greater depths.2

Fisheries:

Caught mainly with handlines and bottom longlines.

Similar species:

 
Lutjanus argentimaculatus
Mangrove jack
Lutjanus argentimaculatus
Lutjanus argentimaculatus differs in having longitudinal scale rows mostly horizontal, with some ascending obliquely above lateral line (vs. obliquely positioned); nostrils without prominent groove (vs. prominent grooves present) and vomerine tooth patch with medial posterior extension (vs. without medial posterior extension).
 
Lutjanus malabaricus
Malabar snapper
Lutjanus Marabaricus
Lutjanus malabaricus differs in having longitudinal scale rows mostly horizontal, with some ascending obliquely above lateral line (vs. obliquely positioned) and nostrils without prominent groove (vs. prominent grooves present)
 
Lutjanus sebae
Red emperor
Lutjanus sebae
Lutjanus sebae differs in having dorsal elements 11,15–16 and anal elements 3,10; (vs; 11,13–14 and 3,8) preopercular notch moderately developed (vs. indistinct) and juvenile and sub adult white with three red to dark brown bars (vs. diagonal dark bar from eye the dorsal-fin origin and black bar over caudal fin peduncle).

External links:

FishBase
The IUCN Red List of Threatened SpeciesTM

References:

  1. 1.
    Wright A, Dalzell P, Richards A. Some aspects of the biology of the red bass, Lutjanus bohar (Forsskal), from the Tigak Islands, Papua New Guinea. Journal of fish biology [Internet]. 1986;28(5):533–44. Available from: https://doi.org/10.1111/j.1095-8649.1986.tb05191.x
  2. 2.
    Marriott R, Mapstone B, Begg G. Age-specific demographic parameters, and their implications for management of the red bass, Lutjanus bohar (Forsskal 1775): a large, long-lived reef fish. Fisheries Research [Internet]. 2007;83(2–3):204–15. Available from: https://doi.org/10.1016/j.fishres.2006.09.016