Morphology Data of Congolapia bilineata
Identification keys
Abnormalities
Main Ref. Dunz, A.R., E. Vreven and U.K. Schliewen, 2012
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

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

Diagnosis: differs from C. crassa and C. louna by having 1 complete scale row and 1 additional scale row with smaller dorso-ventrally compressed scales between upper lateral line and base of last dorsal spine (vs. 2 complete scale rows and 1 additional row of very small scales in-between); differs from C. crassa by a shallower body with only a minimal overlap, 32.2-40.5% SL vs. 40.4-48.4%; and from C. louna by a shorter last dorsal spine, 9.4-12.2% SL vs. 12.9-15.0%; all scales cycloid; 26-27 scales on horizontal line; 17-22 upper lateral line scales; 8-11 lower lateral line scales (Ref. 92878).

Description: moderately deep-bodied with a pointed snout, a slightly convex frontal profile and a truncate to slightly rounded caudal fin (Ref. 52307).

Coloration: background colour light olive-green to yellowish, chest and belly light yellow to whitish with small reddish dots; lower half of head yellowish olive, especially on cheek, and upper half of head olive-green; upper lip bluish and lower lip whitish; a horizontal iridescent blue line above anterorostral margin of preopercle; iris dark brown; apparently depending on motivational state, body with 6-7 black backward slanted, unbranched (not Y-shaped) bars and a nape band or 2 black stripes along lateral line; yellow line between these 2 lines; black thin lachrymal stripe extending from lachrymal to jaw angle; black opercular spot, extended into a sloping stripe; pectoral fin light greenish to hyaline with a yellow base, pelvic fin and anal fin greenish yellow; dorsal fin greenish, yellow edged, no clear 'tilapia spot', except for juveniles; caudal fin greenish yellow (Ref. 92878).

Ease of Identification

Meristic characteristics of Congolapia bilineata

Lateral Lines 2 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
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 12 - 14
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 16 - 17
Soft-rays total 9 - 11
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 8 - 9

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   13 - 14
Pelvics Attributes  more or less normal
Position    thoracic  before origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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