Morphology Data of Opsanus dichrostomus
Identification keys
Abnormalities
Main Ref. Collette, B.B., 2001
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 elongated
Cross section oval
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Narrow interorbital distance (29-65 thousandths of SL), usually less than the diameter of the orbit (60-104 thousandths of SL), versus usually equal to or wider than the orbit diameter in other Opsanus species. Similar to O. phobetron, both usually have the posterior part of lower half of the mouth darkly pigmented in specimens over 7 cm SL. Upper lateral-line papillae 26, lower 23. Pectoral fin glands 12, starting between uppermost 2 pectoral fin-rays (Ref. 41041).

Ease of Identification

Meristic characteristics of Opsanus dichrostomus

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
on upper limb
total
Vertebrae
preanal 10 - 10
total 32 - 35

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 3 - 3
Soft-rays total 23 - 26
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 20 - 22

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   17 - 19
Pelvics Attributes  
Position    
Spines     
Soft-rays   
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