Monotaxis heterodon (Bleeker, 1854)
Monotaxis heterodon (Bleeker, 1854)
Genus: , ,

Scientific Name: Monotaxis heterodon

English Name: Redfin emperor

Creole Name:

French Name:

IUCN Red List Status: Least Concern (LC)


Dorsal spines: 10; Dorsal rays: 10; Anal spines: 3; Anal rays: 9.

Cheek with scales. Sides of jaws with round molars. 12.5 scales rows between lateral line and anal fin origin.

A silvery-grey to orangy seabream, darker dorsally. Narrow white bars on body 1-2 scale rows wide. A large black blotch behind the pectoral-fin base. Lips brownish to 
reddish. Red tinge to fins and a yellowish tail.

Similar to M. grandoculis but with narrower upper body bars (2 scales wide rather than 3-4), no black spots at base of soft dorsal fin, smaller size and dark colouration 
extending further down flanks.


Maturity: Unknown. Max 35cm TL

Habitat and Ecology:

Inhabits sheltered coral reefs (depth 3-25 m). Solitary or in small groups. 

Fishery Status:

This species is not protected or subject to fishery regulations.


Monotaxis grandoculis differs in having yellow lips (vs. red); black spots usually at base of soft dorsal fin (vs. no black spots) and 13½ scale rows below lateral 
line to anal-fin origin (vs. 12½). Juveniles have broad pale bars on sides (vs. narrow pale bars).

Photo. courtesy and (c) 2022 Save Our Seas Foundation. Photographer: Ryan Daly. Photo taken in the Amirantes.


Bray, D.J. (2018). Monotaxis heterodon in Fishes of Australia, (03/07/22). 
Carpenter, K.E. et al. (2016). Monotaxis heterodon. The IUCN Red List 2016: (03/07/22).
fishIDER, CSIRO Australian National Fish Collection. Monotaxis heterodon. (03/07/22). 
Froese, R. & D. Pauly. (Eds.) (2022). FishBase. (03/07/22).
Reef Life Survey. Monotaxis heterodon, Redfin emperor. (03/07/22). 
WoRMS. Monotaxis heterodon (Bleeker, 1854). (04/07/22). 


Nevill, J.E.G. & Daly, R. (2022). Monotaxis heterodon, Redfin emperor. Seychelles Seatizens.

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