Morphology Data of Chromidotilapia guntheri
Identification keys
Abnormalities
Main Ref. Lamboj, A., 1994
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors always different colors between mature adults
Remarks Male distinguished by presence of 2 bright red spots, one located in postero-ventral area of eye and other, triangular, behind opercle; also the distal margin of dorsal and upper margin of caudal fins reddish, with blue submarginal band; female characterized, especially in reproduction period, by broad pink, sometimes violet, ventral area; upper margin of dorsal and caudal fins black (Ref. 53405).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: 21-25 rakers on first gill arch; when stressed with two continuous dark bands on body; 1st dorsal fin spine 30-35% length of fifth spine; caudal fin truncate to subtruncate; dorsal head profile straight; iris yellow to brownish, posterior half sometimes red; upper lip white or pale blue; anterior 2-3 dorsal fin spines with black interspinous membrane in juveniles (Ref. 81260).

Description: relatively robust when adult (body depth 30.8-40.3%, mean 36.5% SL) (Ref. 81260). Snout prominent, long and acute (Ref. 81260), 36.7-46.0% of standard length; 2 (rarely 3) rows of monocuspid teeth in jaws; lower pharyngeal bone with slender (bicuspid) teeth; no micro-gillrakers; scales cycloid (Ref. 53405). Predorsal profile rises steeply over eyes, more or less straight to dorsal fin origin; caudal peduncle usually deeper than long or occasionally longer than deep; 11 hypobranchial and ceratobranchial rakers, 9-10 (median 10) lanceolate epibranchial rakers (Ref. 81260). 18-22 scales in upper lateral line, 9-12 in lower (Ref. 26710). 3 scales between 8th pored scale of upper lateral line and dorsal fin base; in adults of both sexes some dorsal and anal fin rays elongated; caudal fin truncate to subtruncate; sexual dimorphism well-developed; males usually 10-20% larger than females, dorsal, anal and pelvic rays in males more elongated (Ref. 81260).

Coloration: body bronze-brown, paler ventrally; dark pigment around scale margins more prominent in males than females; often 2 dark longitudinal bands on body, especially in juveniles; sometimes these bands are replaced by 2 rows of dark blotches; males often with short red mid-lateral band immediately behind outer border of opercle and with reddish branchiostegal membranes (Ref. 81260). Males with 2 bright red spots, one located in postero-ventral area of eye and other, triangular, behind opercle (Ref. 53405). Lips white to bluish, cheek and opercle with a bluish or white flush; chest and belly white (Ref. 81260). Belly and flanks of ripe females intensive red/pink, sometimes violet, especially when courting (Ref. 53405, 81260). Dorsal and upper half of caudal with red margin, more prominent in males than females (Ref. 53405, 81260), and with blue submarginal band (Ref. 53405). In females most of dorsal fin and often upper half of caudal with a silvery white colouration, also in many females there is a row of dark black maculae on the base of this fin (Ref. 81260). Upper margin of dorsal and caudal fins black in females (Ref. 53405). In juveniles (up to about 2.5 cm SL), anterior parts of dorsal fin (2-3 spines) black (Ref. 81260).

Ease of Identification

Meristic characteristics of Chromidotilapia guntheri

Lateral Lines 2 Interrupted: No
Scales on lateral line 26 - 34
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 15 - 16
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 11 - 15
on upper limb 9 - 10
total 21 - 25
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 15 - 17
Soft-rays total 9 - 12
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 3 - 4
Soft-rays total 6 - 8

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     1
Soft-rays   5 - 5
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