Morphology Data of Sicydium brevifile
Identification keys
Main Ref. Harrison, I.J., P.J. Miller and F. Pezold, 2003
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

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

Diagnosis: posterior tip of upper jaw extending to below posterior margin of eye or beyond (Ref. 57403), 79590). 63-136 long, slender, unicuspid setiform teeth on each half (left and right) of upper jaw, with alternate teeth usually staggered in 2 rows (although it may be difficult to easily distinguish these rows as separate)(Ref. 79590), not separated by median tubercle (Ref. 57403, 79590).

Description: upper lip smooth, with a median notch but no distinct median tubercle (fleshy swelling); each half of lower jaw usually bears 4-9 caniniform teeth and 40-50 labial teeth (although a single individual that appears to be S. brevifile has 2 caniniform and 35 labial teeth on each half of lower jaw); in adults, anterior labial teeth, attached to opposite halves of lower jaw, separated broadly by a wide projection of soft tissue at dentary symphysis; 17-25 cycloid predorsal scales on nape; 53-66 scales in longitudinal series (including 2-3 scales on caudal fin base); 17-24 scales in rearward transverse series; abdomen covered by cycloid scales; 1st dorsal fin VI, 2nd dorsal fin I-10, anal fin I-10, pectoral fin 18-21 (usually 20 or 21), caudal fin with 17-18 segmented rays, 13-15 of which are branched; preopercular canal incorporating 3 pores (Ref. 79590).

Coloration: Preserved adult specimens: dark brown on body and may be irregularly freckled with small spots (postlarvae and early juveniles may have about 7 faint bars on flanks); cheek and opercle with small speckles and some striations; dorsal fins dark; anal fin faintly speckled except near tips of rays, which are darker; caudal fin dusky, slightly darker along dorsal margin; pectoral fin dusky with 2 vague rows of darkish spots near base, and dark tips to fin rays (Ref. 79590). In life: pelvic fin red at base; caudal fin with reddish/orange bands along posterior and upper margin; anal fin with orange/salmon distal margin (Ref. 79590).

Ease of Identification

Meristic characteristics of Sicydium brevifile

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 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 7
Soft-rays total 10
Adipose fin present

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number 1
Spines total 1
Soft-rays total 10

Paired fins

Pectoral Attributes  
Soft-rays   18 - 21
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Musschoot, Tobias
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17