Morphology Data of Oreochromis ismailiaensis
Identification keys
Main Ref. Mekkawy, I.A.A., 1995
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral short and / or deep
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales

Head with straight profile; mouth terminal, oblique, moderately large; maxillary extending to below the anterior border of the orbit (Ref. 47363). Ventral fin reaching the vent; the pectoral fin reaching beyond the origin of anal fin; caudal fin truncate, more or less oblique in some cases; the last dorsal soft fin ray extending to the dorsal origin of caudal fin (Ref. 47363). Caudal peduncle as long as deep or a little deeper than long; ventral outline straight or slightly rounded (Ref. 47363). Scales not denticulate; two lateral lines present; the majority of scales of the dorsal one pored (Ref.47363).

General body colour pale grey-silver, darker below the dorsal fin and on the dorsal side of the head; belly being usually white; 8 black vertical bars on the body, the first one partly developed; a black dorsal opercular spot present (Ref. 47363). Dorsal fin with oblique black striations on their posterior soft rays, no tilapia mark on the dorsal fin; caudal fin dark red without vertical stripes; a black pyramid present, its base at the caudal fin base, its top extending to fin margin; anal fin reddish with a black anterior base (Ref. 47363). Eye with black iris, with a red circle around the pupil (Ref. 47363).

Ease of Identification

Meristic characteristics of Oreochromis ismailiaensis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 15 - 20
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 20 - 29
total 27 - 32


Dorsal fin(s)

Fins number
Finlets No. Dorsal   
Spines total 15 - 17
Soft-rays total 11 - 14
Adipose fin absent

Caudal fin


Anal fin(s)

Fins number
Spines total 3 - 3
Soft-rays total 8 - 11

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Boden, Gert
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