Pseudobalistes flavimarginatus   (Ruppell,  1829) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Randall, J.E.

Size: 60.0 cm TL (male)

Color: Brownish, anterior and lower parts of head pale yellowish, each scale of sides with a brown spot. Membrane of first dorsal pale with 5 to 7 brownish spots. Basal half of second dorsal and anal brownish, distal half lighter with a submarginal brownish band. Caudal brownish with a lighter and another brownish vertical band posteriorly and distal margin clear. Pectoral brownish basally, becoming pale posteriorly.

Head 2.7-2.8 in standard length, 3.4-3.5 in total length. Depth of body 1.65-1.80 in standard length, 2.2-2.3 in total length. Eye diameter 4.3-5.3 in head, 2.8-3.6 in snout and 1.3-1.8 in highly convex interorbital space. A short groove in front of eye and a few shallow longitudinal depressions below the eye. Front of first dorsal spine with small tubercles, its length slightly more than 1/2 length of head, second spine equal to 1/2 length of first spine and third spine about 1/4 of first spine. Second dorsal and anal fins rounded, rather high anteriorly, rays decreasing in length gradually to the last. Caudal fin rounded in young, emarginate and with produced marginal lobes in large specimens. Pectoral fin slightly shorter than half length of head. Ventral spine movable and covered with tubercles and spinules. Scales large, smaller on head; cheeks largely naked anteriorly. Each scale covered with small tubercles. Posterior part of tail and caudal peduncle with 5 rows of small conical spines.
Number of spines in the first dorsal fin: III; number of spines and rays in the second dorsal fin: ii, 23-25; number of spines and rays in the anal fin: ii, 21-23; number of rays in the pectoral fin: i, 14; number of scale rows along the midside of body from the upper corner of operculum to the midbase of caudal fin in the absence of lateral line: 29-30+7; number of horizontal scale rows usually counted from origin of the dorsal fin to the lateral line and from anal origin to the lateral line: 19-21.

Oviparous, dioecious, external fertilization, guarders, nesters. Males migrate to a traditional spawning ground where they establish territories enclosing nest sites and egg chambers. Nesting occurs in sand-bottomed channels and shallow cuts through the barrier reef. The nest consist of depressions up to 2 m wide and 0.7 m deep. Females arrive several days later and select a male for mating. Exhibit biparental care. Up to 430,000 or more eggs may be deposited in a spongy fist-sized cluster weighted down with pieces of rubble. Nest-guarding females are aggressive.

Remarks: Values in above description denote proportions.

Synonym (s)
Balistes flavimarginatus Ruppell, 1829
(Senior synonym)
Pseudobalistes flavimarginatus (Ruppell, 1829)
(Senior synonym)
Balistes flavimarginatus Ruppell, 1828
Pseudobalistes flavimarginatus Jones and Kumaran, 1959
Pseudobalistes flavomarginatus Smith, 1949
Pseudobalistes flavomarginatus (Ruppell, 1829)

Common Name (s)
• Yellowmargin Triggerfish (English)
• Rondu (Mahl)
• Palli (Malayalam)
Economic Importance and Threats
(Fisheries, aquarium. Marketed fresh and dried-salted; ornamental fish
Causes ciguatera poisoning)

Habitat:  Reef Associated, Estuarine, Coastal
Trophic Level:  Consumer
Prey:  Tips of coral branches, gastropods, crustaceans, foraminiferans, tunicates and sea urchins


• Lakshadweep, Kavaratti Atoll (Lat: 10.55) (Long: 72.63) INDIA (Record: 01/1991-06/1992)
• Lakshadweep, Agatti INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep INDIA
• Andaman and Nicobar Islands, Andamans INDIA
• Red Sea
• Andaman and Nicobar Islands, Great Nicobar Island INDIA (Record: 08/2000-07/2003)
• Lakshadweep Islands INDIA (Record: 11/1993-01/1997)
• Lakshadweep, Minicoy Island (Lat: 8.11) (Long: 73.3) INDIA

Literature Source(s)
  • Anand, PEV and Pillai, NGK (2003) Habitat distribution and species diversity of coral reef fishes in the reefslope of the Kavaratti atoll, Lakshadweep, India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 45(1) 88-98 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -
  • Jones, S and Kumaran, M (1980) Fishes of the Laccadive Archipelago The Nature Conservation and Aquatic Sciences Service, Trivandrum, Kerala 760 pp Available at - NIO, Goa
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean; (Fishing area 51). FAO, Rome 1 Available at -
  • Rajaram, R; Srinivasan, M; Khan, SA and Kannan, L (2004) Ichthyofaunal diversity of great Nicobar Island, Bay of Bengal Journal of Indian fisheries association 31 13-26 Available at - NIO, Goa
  • Jones, S. (1969) Catalogue of fishes from the Laccadive Archipelago in the reference collections of the Central Marine Fisheries Research Institute. Bulletin of Central Marine Research Institute CMFRI, Cochin 8 1-35 Available at -
  • Murty, VS (2002) Marine ornamental fish resources of Lakshadweep CMFRI Special Publication CMFRI 72 1-134 Available at -
  • Jones, S and Kumaran, M (1959) The fishing industry of Minicoy Island with special reference to the tuna fishery Indian Journal of Fisheries Indian Council of Agricultural Research 6 (1) 30-57 Available at -

Page last updated on:2011-06-13

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