Strongspine Silver Biddy (species: Gerres longirostris) in Lizard Island Field Guide (Lizard Island Field Guide)
Gerres longirostris
Strongspine Silver Biddy

©Anne Hoggett: Gerres longirostris about 18 cm long at night close to shore at Lizard Island Research Station.

©Anne Hoggett: Gerres longirostris about 15 cm long close to Casuarina Beach, Lizard Island. Note dark edge of tail fin and faint vertical bars made up of rectangular spots.
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Order Perciformes
Family Gerreidae
Genus Gerres
Species Gerres longirostris



Distinguishing features

A small silvery fish with a downward-turned snout giving a concave profile below the mouth, tail with a dark trailing edge, and sometimes displaying indistinct bars on body made up of rectangular spots.


  • Up to 44.5 cm (Length according to Fishbase accessed 6 Feb 2017.)

Depth range

  • Depth range data is not yet available.



©Atlas of Living Australia: Australian distribution

Local abundance

  • Lizard Island: Small (10-20 cm) individuals are frequently seen close to Casuarina Beach, especially early in the morning. They may be solitary or in small, loose groups.

Web resources


References that assist with identification

  • Allen and M.V. Erdmann, G.R. (2012). Reef fishes of the East Indies. Volumes I-III in: Reef fishes of the East Indies. Tropical Reef Research, Perth, Australia. LIRS catalog number 90162.