Istiblennius edentulus   (Forster & Schneider,  1801) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Randall, J.E.

Size: Max length 16.0 cm TL male/unsexed; 13.2 cm SL (female)

Color: Variable; generally brown to pale below, with 6-7 darker double transverse bars. Females generally with dark brown spots on posterior part of body and caudal peduncle and small brownish spots on dorsal and anal. A dark line from behind eye to corner of mouth. Caudal, pectoral and pelvic pale. Males without spots on body and fins. Males darker than females and with narrow oblique lines on dorsal and 2 or 3 light longitudinal lines on anal. Crest blackish.

Head 4.2-4.7 in standard length, 5.1-5.8 in total length. Depth of body equal to or slightly more than length of head. Eye diameter 3.6-4.3 in head and 0.5 in interorbital space. Nasal cirrus of 3-5 filaments. Supraorbital tentacle single, more than half eye diameter in length. Nuchal cirrus on each side single. Crest well developed in males, absent in females. First dorsal lower than second, last ray of second dorsal attached to dorsal edge of caudal fin. Anal fin lower than second dorsal, last ray not joined to caudal peduncle. Four or five anterior rays of anal fin in large males often swollen and crenulated. Longest pectoral fin ray slightly shorter than head. Ventral fin equal to postorbital length of head.
Number of spines and rays in the dorsal fin: (XII) XIII, 19-21; number of spines and rays in the anal fin: II, 20-22; number of rays in the pectoral fin: 14 (15); number of spines and rays in the ventral fin: I, 3.

Dioecious, external fertilization, guarders, nesters. Oviparous, distinct pairing. Eggs are demersal and adhesive.

Adults jump out of the water in energetic skippings to another pool when pursued. May remain out of water under rocks or seaweeds. They breathe air when out of water.

Remarks: Values in above description denote proportions.

Synonym (s)
Blennius edentulus Bloch and Schneider, 1801
Istiblennius edentulus Munro, 1955
Istiblennius enosimae Munro, 1955
Salarias edentulus Chapman, 1951
Salarias quadricornis Day, 1878
Alticops edentulus (Forster & Schneider, 1801)
(Senior synonym)
Blennius cinereus Castelnau, 1875
(Junior synonym)
Blennius edentulus Forster & Schneider, 1801
(Senior synonym)
Blennius truncatus Forster, 1801
(Junior synonym)
Istiblennius edentulus (Forster & Schneider, 1801)
(Senior synonym)
Istiblennius enosimae (Jordan & Snyder, 1902)
(Junior synonym)
Salarias atratus Macleay, 1882
(Ambiguous synonym)
Salarias atrimarginatus Fowler, 1946
(Junior synonym)
Salarias azureus Seale, 1906
(Junior synonym)
Salarias diproktopterus Bleeker, 1857
(Junior synonym)
Salarias fluctatus Fowler, 1945
(Junior synonym)
Salarias garmani Jordan & Seale, 1906
(Junior synonym)
Salarias gilberti Bryan & Herre, 1903
(Junior synonym)
Salarias insulae Ogilby, 1899
(Junior synonym)
Salarias marcusi Bryan & Herre, 1903
(Junior synonym)
Salarias melanocephalus Bleeker, 1849
(Junior synonym)
Salarias quadricornis Valenciennes, 1836
(Junior synonym)
Salarias rechingeri Steindachner, 1906
(Junior synonym)
Salarias sindonis Jordan & Seale, 1906
(Junior synonym)
Salarias sumatranus Bleeker, 1851
(Junior synonym)
Scartella enosimae (Jordan & Snyder, 1902)
(Junior synonym)
Scartichthys basiliscus Fowler, 1904
(Junior synonym)
Scartichthys enosimae Jordan & Snyder, 1902
(Junior synonym)
Istiblennius edentululus (Forster & Schneider, 1801)
Istilbennius edentulus (Forster & Schneider, 1801)

Common Name (s)
• Rippled Rockskipper (English)
• Rockskipper (English)
• Digu Funna (Mahl)
• Kakkadan (Malayalam)
• Kattu (Mahl)
Economic Importance and Threats
Importance:  Commercial

Habitat:  Reef Associated, Estuarine
Trophic Level:  Primary Consumer
Prey:  Benthic algae/weeds


• Lakshadweep, Agatti INDIA
• Lakshadweep, Amini INDIA
• Lakshadweep, Bitra INDIA
• Lakshadweep, Chettalatt INDIA
• Lakshadweep, Kalpeni INDIA
• Lakshadweep, Kavaratti INDIA
• Lakshadweep, Kilttan INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep INDIA
• Red Sea
• Andaman and Nicobar Islands, North Reef Island INDIA
• Lakshadweep, Kadamatt INDIA (Record: 05/01/1987-06/02/1987)
• Lakshadweep, Chettalatt INDIA (Record: 05/01/1987-06/02/1987)
• Lakshadweep, Kilttan INDIA (Record: 05/01/1987-06/02/1987)
• Lakshadweep, Suheli INDIA (Record: 06/03/1987-01/04/1987)
• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • 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
  • 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 -
  • 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 -
  • Rao, GC; Rao, DV and Devi, K (1994) A faunal exploration of the North Reef Island sanctuary, North Andaman Journal of the Andaman Science Association Andaman Science Association, Port Blair 10(1&2) 68-81 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 -
  • Kumaran, M; Murty, VS and Lalmohan, RS (1989) Resources of ornamental fishes Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 46-64 Available at -
  • Talwar, PK (1990) Fishes of Andaman and Nicobar Islands: A synoptic survey Journal of the Andaman Science Association Andaman Science Association, Port Blair 6(2) 71-102 Available at - NIO,Goa

Page last updated on:2011-08-10

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