Morphology Data of Galaxias arcanus
Identification keys
Abnormalities
Main Ref. Raadik, T.A., 2014
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 oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from all other species in the Galaxias olidus complex by the following set of characters: a shallow body with a straight ventral profile; long and shallow caudal peduncle, its peduncle length is greater than the caudal fin length; caudal peduncle flanges are poorly developed; the distinctive snout extends anteriorly from the thick and fleshy upper jaw as a fleshy protrubence, bulbous in lateral profile; nostrils of moderate length, ofter not visible from ventral view; subterminal mouth and lower jaw 81.5 (72.9-99.4) % of length of upper jaw; most anterior tip of snout level with about lower 0.3 of eye diameter; head wide and shallow; short pre-pelvic fin length, pectoral fin to pelvic fin length and post-orbital head length dimensions; large, ventrally oriented pectoral and pelvic fins (12.1-16.7 and 9.2-13.0 % SL respectively); low mean vertebral count of 51, although range is broad (47-55); pyloric caecae 0-1, when present it is short (1.0 % SL) and wide; gill rakers of moderate length, thin and sharply pointed; anal fin origin usually under 0.4 distance posteriorly along dorsal fin base; distinctive cryptic colouration and no black bars along lateral line (Ref. 98815).

Ease of Identification

Meristic characteristics of Galaxias arcanus

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
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 6 - 11
on upper limb 2 - 6
total 8 - 17
Vertebrae
preanal
total 47 - 54

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 8 - 11
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 8 - 12

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   12 - 16
Pelvics Attributes  
Position    
Spines     
Soft-rays   6 - 8
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