Morphology Data of Hippocampus abdominalis
Identification keys
Main Ref. Lourie, S.A., A.C.J. Vincent and H.J. Hall, 1999
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs other
Different appearance always different morphology between mature adults
Different colors
Remarks Males with brood pouch; females with ovipositor (Ref. 205). Males are heavier, tail longer, and snout shorter (Ref. 52034).

Descriptive characteristics of juvenile and adult

Striking features striking shape of body
Body shape lateral other
Cross section angular
Dorsal head profile
Type of eyes more or less normal
Type of mouth/snout tube-like
Position of mouth terminal

Description: (based on 17 specimens): Adult height: 8.0-32.0 cm; Rings: 12-13 + 47 (45-48)

Snout length: 2.6 (2.2-3.2) in head length; Dorsal fin rays: 27-28 (25-29) covering 4+1 rings; Pectoral fin rays: 15-17; Caudal fin absent; Coronet: low, triangular wedge; Spines: low, rounded bumps only.

Other distinctive characters: (very) prominent rounded eye spines; often with thick fronds attached to head region; very deep body with keel (especially females); mature males have extremely prominent (usually white) brood pouch.

Color pattern: pale, near white to mottled yellow to variable brown; dark spots and splotches on head and trunk; tail with alternating dark and light bands; dorsal fin mottled; males have more dark blotches than females and commonly have a yellow slash near the top of the pouch 34.

Ease of Identification

Meristic characteristics of Hippocampus abdominalis

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)

Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 25 - 31
Adipose fin absent

Caudal fin

Attributes other (see remark)

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 4 - 4

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   14 - 17
Pelvics Attributes  suppressed/absent
Position    absent
Spines     0
Soft-rays   0 - 0
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Garilao, Cristina V.
Modified by Luna, Susan M.
Comments & Corrections
Sign our Guest Book
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17