Morphology Data of Oxyeleotris colasi
Identification keys
Main Ref. Pouyaud, L., [N.] Kadarusman, R.K. Hadiaty, J. Slembrouck, N. Lemauk, R.V. Kusumah and P. Keith, 2012
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males possess a triangular and flattened urogenital papilla with distal tip rounded (vs. broad and flattened in females) urogenital papilla with fimbriate margin.

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales cycloid and ctenoid scales

This species differs from all of its congeners by the combination of the following characters: absence of eyes; total depigmentation on skin and fins; well developed sensory papillae system, with a marked relief on snout, preorbital region, anteriormost part of chin and consisting of low fleshy ridges on each side of the head; sometimes one or two vertical rows of papilla on the body, laterally, behind the pectoral fins; cephalic sensory pores reduced (see Figure 2 & 3 of original publication), pores F, I, J, K, and L absent, no extra pores between D and E; pores A, B, C and D, always present as N, O, P; pores H and M absent on some specimens (M sometimes missing on one side of the fish but not on the other), pores E, G, rarely present; dorsal rays VI-I,9 to 11; anal rays I,8-9; cycloid scales dorsally, covering the belly and extending from the posterior part of the head to the flanks to the middle of first dorsal fin; ctenoid scales on flanks from the middle of first dorsal fin to caudal peduncle; 47-49 lateral scales; 19 transverse scales; 30-32 predorsal scales; anterior-most predorsal scales extending until middle of head; 23-25 circumpeduncular scales; 13 gillrakers; 10 + 16 = 26 vertebrae; head length 38.1-39.7% of SL; snout length 7.2-7.4% of SL; upper jaw length,13.4-14.0% SL; mouth width 8.5-11.4% SL; anterior body depth 16.0-18.8% SL and body width 17.0-18.1% of SL; caudal peduncle length 22.5-24.0 % SL and depth 10.8-11.9% of SL; predorsal length 46.1-47.1% of SL; prepectoral length 39.2-41.3% of SL; pectoral fin length 23.9-26.7% SL (Ref. 93235).

Ease of Identification

Meristic characteristics of Oxyeleotris colasi

Lateral Lines Interrupted: No
Scales on lateral line 47 - 49
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 23 - 25
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 13 - 13
total 26 - 26


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   
Spines total 7 - 7
Soft-rays total 9 - 11
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

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

Paired fins

Pectoral Attributes  
Spines     1
Soft-rays   6 - 6
Pelvics Attributes  
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
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