Morphology Data of Alestes macrophthalmus
Identification keys
Main Ref. Paugy, D. and S.A. Schaefer, 2007
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance always different morphology between mature adults
Different colors
Remarks Pronounced sexual dimorphism affecting the shape of the anal fin.

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales cycloid scales

Diagnosis: very well developed adipose eyelid (Ref. 42019, 80290, 81279); 18-20 branched anal-fin rays (Ref. 2880, 42019, 80290, 81279). 16-20 branched rays in Tanganyika specimens (Ref. 36899, 45485). 17-22 gill rakers on lower limb of first gill arch; dorsal-fin origin at about same level of pelvic-fin insertions (Ref. 2880, 80290, 81279). Sexual dimorphism affecting shape of anal fin (Ref. 80290, 81279).

Description: well developed fontanel (Ref. 2880). Anal fin: III, 18-20 (Ref. 2880, 42019, 80290, 81279) or III, 16-20 (Ref. 36899, 45485). Dorsal fin: II, 8 (Ref. 2970) or III,8 (Ref. 36901).

Coloration: silvery body, back darker bluish or greenish, lower sides and ventral part white; pectorals and ventrals sometimes blackish (Ref. 2880, 80290, 81279).

Ease of Identification

Meristic characteristics of Alestes macrophthalmus

Lateral Lines 1 Interrupted: No
Scales on lateral line 36 - 46
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 6.5 - 7.5
Scale rows below lateral line 3.5 - 3.5
Scales around caudal peduncle 12 - 12
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 17 - 22
on upper limb


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 10 - 11
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 19 - 23

Paired fins

Pectoral Attributes  more or less normal
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Comments & Corrections
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17