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Phylum Chordata > Subphylum Vertebrate > fishes > Family Blennidae
Variable fang-blenny
Petroscirtes variabilis

Family Blennidae
updated Aug 10

Where seen? These small elongated fishes are sometimes encountered on our Southern shores, among seagrasses. One was encountered hidden inside a large snail shell.

Features: Up to 15cm long but those seen were 5-7cm long. With an elongated body, a blunt squarish snout. The lower jaw has a pair of long curved fangs. It lacks scales and has a continuous dorsal fin along the body length which it holds up rather handsomely when alarmed. Colours usually a dull olive green with pale markings, some brighter green. It has a yellow underside. There are six large irregular dark blotches along upper side. The males are orange-brown while females are sea-green above and lighter below.

What does it eat? According to FishBase, it eats mainly small crustaceans and occasionally nips off scales from other fishes. According to Kuiter, it scrapes algae off broad seagrasses.

Blenny babies: It lays adhesive eggs.

Cyrene Reef, May 08

Pulau Semakau, Dec 05

Variable fang-blennies on Singapore shores

Changi, Jul 07


Tanah Merah, Sep 09

Guarding eggs laid inside a Fan shell.


Tanah Merah, Oct 09

Pulau Hantu, Nov 03


Pulau Pawai, Dec 09
Photo shared by James Koh on his flickr.

Guarding eggs laid inside a large shell.
Pulau Pawai, Dec 09

more photos of blennies on Singapore shores

Links

References

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