Siganus canaliculatus   (Park,  1797) (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Actinopterygii
Order:Perciformes
Family:Siganidae

Image copyrights: Mya Than Tun

Description
Size: 19-30 cm; Height 2 2/3- 2 3/4. Head 4 2/3- 4 3/4.

Color: In life highly variable, depending on mood of fish and color of substrate; greenish grey above to silver on belly; numerous pearly blue, match-head size spots covering nape and sides, arranged more or less in horizontal rows (about 3 rows above and 10 below lateral line); spots often ovoid or rod shaped. Frightened and injured fish mottled brown; mottling includes dappling with pale cream and dark brown spots which may obscure basic color pattern. Caudal fin plain grey or irregularly barred with pale and dark grey; pectoral fins hyaline; dorsal, anal and pelvic spines and rays same color as adjacent areas of sides; fin membranes grey; after death fins usually marbled with pale and dark grey, dorsal fin rays banded.

Eye about 3. Median dorsal spines longest, the first spine much shorter than the last one. Soft dorsal angular, higher than spinous part. Median anal spines longest. Pectorals shorter than head. Caudal slightly emarginate. Preopercular angle 89A°-96A°. Cheeks appear to be scaleless but sometimes with few to many, fine, embedded scales on lower 2/3. Midline of thorax scaleless between pelvic ridges. Margin of anterior nostril encircled by a low flange with the flap extending towards posterior flap, flap shortens with increasing size. Closely resembles S. fuscescens but differs by its slightly more pointed snout and longer pectoral fins (1.1-1.3 in HL vs. 1.4-1.5 in S. fuscescens). Color pattern is similar to that of S. argenteus and S. fuscescens. Dorsal spines (total): 13 - 13, Dorsal soft rays (total): 10 - 10, Anal spines: 7, Anal soft rays: 9, Vertebrae: 23.
Juveniles form very large schools in shallow bays and also on coral reef flats; school size reduces with size, with adults occurring in groups of 20 individuals or so. Herbivorous, feeds on benthic algae.


Remarks: Values in above description denote proportions.


Synonym (s)
Amphacanthus dorsalis Valenciennes, 1835
(Junior synonym)
Amphacanthus guttatus oramin Bloch & Schneider, 1801
(Junior synonym)
Chaetodon canaliculatus Park, 1797
(Senior synonym)
Siganus albopunctatus (non Temminck & Schlegel, 1845)
(Misapplied name)
Siganus javus (non Linnaeus, 1766)
(Misapplied name)
Siganus oramin (Bloch & Schneider, 1801)
(Junior synonym)
Teuthis dorsalis (Valenciennes, 1835)
(Junior synonym)
Teuthis margaritifera (non Valenciennes, 1835)
(Misapplied name)
Teuthis nebulosa (non Quoy & Gaimard, 1825)
(Misapplied name)
Teuthis oramin (Bloch & Schneider, 1801)
(Junior synonym)
Teuthis siganus (non Ruppell, 1829)
(Misapplied name)
Chaetodon canaliculatus Mungo Park, 1797
Amphacanthus canaliculatus Bleeker, 1852
Teuthis canaliculatus Gunther, 1861
Theutis dorsalis (Valenciennes, 1835)
(misspelling)

Common Name (s)
• Whitespotted Rabbitfish (English)
• Rabbitfish (English)
• Seagrass Rabbitfish (English)
• Slimy Spinefoot (English)
• Pearly Spinefoot (English)
• Pearlspotted Spinefoot (English)
• White Spotted Spinefoot (English)
• Karadumeen (Malayalam)
• Dhagavir (Marathi)
• Kutri (Marathi)
• white-spotted Spinefoot (English)
Economic Importance and Threats
Importance:  Commercial
(Fisheries)
Cultured:  Yes

Ecology
Habitat:  Reef Associated, Demersal, Estuarine
Trophic Level:  Secondary Consumer
Prey:  Zoobenthos, detritus, plants, benthic crustaceans, finfish, insects, worms, benthic algae/weeds, terrestrial plants, polychaetes
Predator:  Saurida elongata

Biogeography


• Andaman and Nicobar Islands, Andaman Islands (Lat: 10) (Long: 93) INDIA
• Tamil Nadu, Pichavaram Mangrove Forest (Lat: 11.03) (Long: 79.78) INDIA
• MYANMAR
• Persian Gulf
• Gulf of Oman
• IRAN
• PAKISTAN
• SRI LANKA
• Kerala, Ponnani Estuary INDIA (Record: 03/1997-02/1999)
• Tamil Nadu, Chennai Coast INDIA
• Andaman and Nicobar Islands, Great Nicobar Island INDIA (Record: 08/2000-07/2003)
• Pondicherry, Pondicherry mangrove (Lat: 11.76) (Long: 79.82) INDIA (Record: 01/2002-12/2003)
• Pondicherry, Pondicherry mangrove (Lat: 11.89) (Long: 79.8) INDIA (Record: 01/2002-12/2003)
• Kerala INDIA
• Andaman and Nicobar Islands INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Cuddalore Coast INDIA (Record: 12/2008)
• Tamil Nadu, Kovalam INDIA
• INDIA
• West Bengal (Lat: 21.45) (Long: 87.9) INDIA
• Tamil Nadu, Rameswaram INDIA

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Page last updated on:2012-01-10

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