Ecsenius frontalis (Valenciennes, 1836)
Smooth-fin blenny
Ecsenius frontalis
photo by Field, R.

Family:  Blenniidae (Combtooth blennies), subfamily: Salariinae
Max. size:  8 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 3 - 27 m
Distribution:  Western Indian Ocean: known only from Red Sea, including gulfs of Aqaba and Suez, and the westernmost part of the Gulf of Aden.
Diagnosis:  Dorsal spines (total): 10-13; Dorsal soft rays (total): 18-21; Anal spines: 2-2; Anal soft rays: 17-22; Vertebrae: 34-37. Dorsal fin X-XIII (typically XII), 18-21 (rarely 21), spinous and segmented-ray portions continuous. Anal fin II,17-22 (typically 19-21). Pectoral fin 14-16 (typically 15). Segmented caudal-fin rays 13 or 14 (rarely 14). Vertebrae 10 or 11 (rarely 10) + 23-26 (rarely 23) = 34 to 37 (rarely 34). Dentary incisor teeth which includes anterior canines very similar in appearance with incisors, 40-53 (rarely < 44); posterior canines 0 or 1(usually 1) on each side. Lateral line lacking vertical pairs of pores, extending posteriorly to point between verticals from 8th and 12th from anterior most dorsal-fin spine (usually past vertical from 8th). With cirrus on posterior rim of anterior nostril; absent on anterior rim. Body coloration of 3 basic color patterns: uniformly brown, dark-brown or black but pigmentless posterior of dark caudal fin base, or generally brownish with darker stripe along dorsal area.
Biology:  Adults are found among corals (Ref. 9710). Oviparous. Eggs are demersal and adhesive (Ref. 205), and are attached to the substrate via a filamentous, adhesive pad or pedestal (Ref. 94114). Larvae are planktonic, often found in shallow, coastal waters (Ref. 94114).
IUCN Red List Status: Least Concern (LC); Date assessed: 25 March 2009 Ref. (130435)
Threat to humans:  harmless


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