Istiblennius periophthalmus   (Valenciennes,  1836) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: The Nature Conservation and Aquatic Sciences Service

Size: 30-115 mm

Color: Male: Dusky or lighter with indistinct vertical bands on sides and indistinct light dots on head with two rows of large spots along sides. A black spot edged white at upper corner of opercle and a pale streak behind eye. Spinous dorsal with large brownish spots, margin of fin clear, soft dorsal clear with narrow brownish oblique lines. Anal pale, somewhat dark submarginally. Caudal clear, ventral border dusky.
Female: Female with indistinct light dots on head and anterior part of body. Pale vertical bands on body often present. Small black dots over posterior part of body. Dorsal and anal mostly clear, spines with indistinct brownish patches, margin of fins somewhat dusky. Dark blotch over operculum bordered with white.

Head 4.3-4.8 in standard length, 5.2-6.0 in total length. Depth of body 4.4-5.1 in standard length, 5.4-6.3 in total length. Eye diameter 3.4-4.3 in head and twice interorbital space. Nasal cirrus with 4-5 filaments. Supraorbital cirrus simple and pointed, nuchal cirrus simple and short. Upper lip crenulate, lower lip smooth. A short canine posteriorly in lower jaw. Last dorsal fin spine short, buried in membrane of notch. Last dorsal ray connected to caudal peduncle by membrane. Last anal fin ray free from caudal peduncle. Longest pectoral ray a little shorter than head without snout.
Number of spines and rays in the dorsal fin: XIII, 20-21; number of spines and rays in the anal fin: II, 20-22; number of rays in the pectoral fin: (13) 14; number of spines and rays in the ventral fin: I, 3.

Remarks: Values in above description denote proportions.

Synonym (s)
Salarias periophthalmus Cuvier and Valenciennes, 1836
Istiblennius periophthalmus Smith, 1959

Common Name (s)
• Red Dotted Blenny (English)
• Digu Funna
• Kattu
• Kakkadan
• Mandian
Economic Importance and Threats
Importance:  Commercial
(Rarely used for aquarium fish.)

Habitat:  Reef Associated
Trophic Level:  Secondary Consumer
Prey:  Feed on filamentous algae and associated small invertebrates, such as foraminiferans, ostracods, copepods, and gastropods.


• Lakshadweep, Minicoy Atoll (Lat: 8) (Long: 71) INDIA
• Lakshadweep, Agatti INDIA (Record: 1980)
• Lakshadweep, Amini INDIA (Record: 1980)
• Lakshadweep, Bitra INDIA (Record: 1980)
• Lakshadweep, Chettalatt INDIA (Record: 1980)
• Lakshadweep, Kadamatt INDIA (Record: 1980)
• Lakshadweep, Kalpeni INDIA (Record: 1980)
• Lakshadweep, Kavaratti INDIA (Record: 1980)
• Lakshadweep, Kilttan INDIA (Record: 1980)
• Lakshadweep, Minicoy INDIA (Record: 1980)
• Lakshadweep, Suheli INDIA (Record: 1980)
• Lakshadweep INDIA (Record: 1980)
• Red Sea (Record: 1980)
• INDIA (Record: 1980)

Literature Source(s)
  • Wafar, MVM (2003) Checklists of reef fauna Available at -
  • Pillai, CSG; Gopakumar, G and Mohan, M (1991) Ichthyofauna of the intertidal reef flats of Minicoy atoll, Lakshadweep An analysis of its structure, relative abundance and food Journal of the Marine Biological Association of India The marine Biological Association of India 34 74-83 Available at - NIO, RC Kochi
  • 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
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2011-03-10

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