Morphology Data of Istiblennius meleagris
Identification keys
Main Ref. Springer, V.G. and J.T. Williams, 1994
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

Dorsal fin XII-XIV, 17-21; notched membrane between spinous and segmented-ray of the dorsal fin >75% the length of the first segmented ray; posterior membrane from posteriormost ray beginning somewhere between the dorsal edge of caudal peduncle, anterior to caudal-fin base, to dorsal margin of caudal fin <15% of caudal-fin length, typically on caudal peduncle, rarely posteriorly past the vertical at caudal-fin base; segmented anal fin rays 17-21; pectoral-fin rays 12-15; vertebrae 11 or 12+24 to 28 = 35-39 (usually 37 or 38); nape cirrus present or absent bilaterally or unilaterally, with slight variations between populations; orbital cirrus tree-like with medial and lateral branches; nasal cirri on rim of each anterior nostril short, palmate, with 2-8 branches (typically <6); bi-pored lateral-line tubes often more than 18; membrane from last dorsal-fin ray usually attached to caudal peduncle at or anterior to caudal-fin base; body with numerous small, pale spots; lateral line canal continuous antedorsally with simple pores (no vertical pairs of pores), extending posteriorly to point between verticals from 8th and 13th (rarely only to 8th) dorsal-fin spines, descending to midside and, in specimens >3 cm SL, continuing posteriorly as series of 6 to 26 short, disconnected, horizontally bi-pored canals/tubes in skin, numbering typically more than 10 and higher, proportional to SL; mandibular pores 4-6; lacking posterior canines; ventral margin of upper lip crenulate; no canine teeth present in lower jaw; both sexes with fleshy, blade-like crest on dorsal part of head; spinous- and segmented-ray portions of dorsal fin faintly to darkly dusky, often bearing dark, slender, oblique stripes (males) or dark spots (females). Largest male 11.8 cm SL; largest female 10.6 cm SL. With ophioblennius stage.

Ease of Identification

Meristic characteristics of Istiblennius meleagris

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


Dorsal fin(s)

Attributes extending over most of the back length
Fins number 1notched No
Finlets No. Dorsal   
Spines total 12 - 14
Soft-rays total 17 - 21
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number
Spines total 2
Soft-rays total 17 - 21

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   12 - 15
Pelvics Attributes  more or less normal
Position    jugular
Soft-rays   3
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Hilomen, Teresa
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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