Petroscirtes variabilis Cantor, 1849
Variable sabretooth blenny
photo by Randall, J.E.

Family:  Blenniidae (Combtooth blennies), subfamily: Blenniinae
Max. size:  15 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 1 - 10 m
Distribution:  Indo-West Pacific: Sri Lanka to Fiji, north to southern Taiwan and the Yaeyama Islands, south to the southern Great Barrier Reef.
Diagnosis:  Dorsal spines (total): 10-11; Dorsal soft rays (total): 16-19; Anal spines: 2-2; Anal soft rays: 16-19. Sexually dimorphic: males are orange-brown while females are sea-green dorsally and lighter below. Similar to P. breviceps in shape but has a blotched, rather than lined pattern on the body. Some color form are probably habitat related. The plain form is mainly green and has numerous tiny pearly spots and occurs in seagrass beds (Ref. 48636).
Biology:  Adults occur in seagrass beds of shallow lagoons. Also in Sargassum rafts during or immediately after wet season (Ref. 48636). Replaced by P. thepassi at Solomon Islands (Ref. 90102). They feed primarily on small crustaceans and occasionally on scales from fishes. 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). This form was named by Bleeker (1852) as Petroscirtes bankanensis.
IUCN Red List Status: Least Concern (LC); Date assessed: 25 March 2009 Ref. (130435)
Threat to humans:  harmless


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