Morphology Data of Nimbochromis polystigma
Identification keys
Abnormalities
Main Ref. Snoeks, J. and J. Manuel, 2004
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales
Diagnosis

Diagnosis: dark spots on pectoral fins; pattern of speckles on body and head; without conspicuous dark bars radiating from the eye; no downward-directed snout; mouth terminal; premaxillary pedicel length <34% head length (Ref. 55922).

Description: outer teeth in jaw stout and unicuspid, sometimes a few bicuspid in larger specimens, and bicuspid in small specimens; inner teeth in jaw stout and (weakly) tricuspid, slightly or strongly recurved in large specimens; 3-4 series of scales on the cheek; lower pharyngeal jaw normal or slightly broad and shallow; pharyngeal teeth widely set, sharp and stout, and occasionally enlarged; gill-rakers normal or short, the largest somewhat flattened but not polyfid; 21-25 scales in upper part of lateral line, 11-16 in lower part; 5-6 scales between pectoral and pelvic fins (Ref. 55922).

Coloration: Live: melanin pattern as in preserved fish; nuptial color pattern overlays the speckled pattern in males, and possibly also in reproductively active females (Ref. 55922). Adult territorial males: characteristic spotted pattern not readily observable; lips green-blue; dorsal, caudal and anal fins blue; dorsal fin with red-orange lappets and white submarginal band; brown maculae and striae pattern not well developed; anal fin yellow/orange distally; pelvic fins dark with white leading edge; less territorial males may have a blue head and yellow body with dark brown spots and speckles, and distal part of anal fin brown-orange (Ref. 55922). Females and immature males: background color white or yellow with many dark brown speckles and spots, to a large extend arranged in rows on dorsal, caudal and anal fin (Ref. 55922). Preserved: speckles and spots on head, body and fins, either as large speckles or giving a more peppered appearance, variable, sometimes difficult to observe; speckles on pectoral fins always present; general body color in both males and females yellow to dark brown; blotches more or less in 5 longitudinal series: 2 dorsal series, 1 midlateral series and 2 ventral series; fins dark brown in larger specimens, camouflaging the speckled pattern except in the pectoral fins; lappets of dorsal fin, trailing edge of pelvic fin and ventral margin of anal fin white; in small specimens the maculae in the caudal fin are clearly arranged in vertical bars (Ref. 55922).

Ease of Identification

Meristic characteristics of Nimbochromis polystigma

Lateral Lines Interrupted: No
Scales on lateral line 32 - 35
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 4 - 6
Scale rows below lateral line 10 - 16
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 10 - 13
on upper limb 3 - 5
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 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 9 - 11

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   13 - 15
Pelvics Attributes  
Position    
Spines     
Soft-rays   
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