Flagtail Glassfish, Ambassis miops Günther 1872


Other Names: Flag-tailed Glassfish, Myops Glassy Perchlet

Flagtail Glassfish, Ambassis miops. Source: Gerald R. Allen. License: All rights reserved

Summary:
The Flagtail Glassfish is known from only a few coastal sites along the North Queensland coast. This species is widely distributed outside of Australia and as such is believed to have a marine larval stage. One of the distinguishing features of this transparent species is a tiny spine situated above the rear corner of the eye.

Cite this page as:
Vanessa J. Thompson, Ambassis miops in Fishes of Australia, accessed 16 Oct 2018, http://fishesofaustralia.net.au/home/species/1585

Flagtail Glassfish, Ambassis miops Günther 1872

More Info


Distribution

In Australia known only from coastal areas of the Cape York Peninsula Queensland, from the Starcke River (14º49´S) to Cairns (16º55´S). Also known from Indonesia, New Guinea, New Caledonia and Rarotoga. Tropical, aggregating in clear, flowing freshwater creeks, mangroves and estuaries within 20 km of the sea.

Features

D VIII, 9-10; A III, 9-10; P 13-14;

Body ovate, compressed, relatively slender; greatest body depth 33.4-38.6 % SL; head length 35.5 to 38.6; snout length 6.7 to 9.1; eye relatively large, diameter 12.9 to 15.0; mouth large, oblique; single supraorbital spine; 2 transverse scale rows on cheek; lateral line usually continuous from upper edge of gill opening to caudal fin base; nasal spine present; 

Scales cycloid, large; horizontal scale rows 9-10; vertical scale rows 28-30; lateral line scales 28-30.

Dorsal fin deeply notched, origin forward of ventral fins; first dorsal spine small, projecting forward; anal fin opposite soft rays of dorsal; height of first dorsal fin 24.6 to 28.3; third dorsal spine slightly longer than second dorsal spine; third anal spine longer than second anal spine; anal and dorsal fins with scaly basal sheath; pectoral fins of moderate size; ventral fins large; caudal fin strongly forked, lobes rounded.

Size

To 8 cm SL.

Colour

Semi-transparent with a silvery/bronze midlateral stripe and dark scale margins that form a faint reticulated pattern dorsally and laterally. Fins mainly clear but sometimes with yellow/bronze on caudal and anterior part of dorsal fin.

Feeding

Feed mainly on aquatic insects but also on smaller fishes, crustaceans and some algae from woody debris.

Biology

Little is known of the reproductive biology of this species but because of its broad distribution it is thought to have a marine larval phase.

Conservation

Not listed on the IUCN Red List of Threatened Species.
Not listed under the Australian EPBC Act.

Remarks

This species is locally abundant but found only from a few sites in Australia.

Similar Species

Most similar to A. macracanthus, but differs in having fewer predorsal scales (12-15 versus 17-22), a more slender body (greatest depth 33.4-38.6% of SL versus 40.0-44.7) and the second dorsal spine slightly shorter than the third spine.

Etymology

Ambassis comes from the Greek, ambasis, -ios, anabasis meaning climbing up. Species name miops comes from the Greek meion meaning less or little and the Greek opsis meaning eye in reference to the small spine above the eye. Common name Glassfish comes from the transparent appearance of this species.

Species Citation

Ambassis miops Günther, A. (1872). Report on several collections of fishes recently obtained for the British Museum. Proc. Zool. Soc. Lond. 1871(3): 652–675 pls 53–70 [655]. Rarotonga, Cook Ils.

Author

Vanessa J. Thompson

Flagtail Glassfish, Ambassis miops Günther 1872

References


Allen, G.R. (1989). Freshwater Fishes of Australia.  Neptune, New Jersey : T.F.H. Publications pp. 1–240

Allen, G.R., Midgley, S.H. & Allen, M. (2002). Field guide to the freshwater fishes of Australia.  Perth : Western Australian Museum 394 pp.

Pusey, B.J., A.H. Arthington & M.G. Read. 1995. Species richness and spatial variation in fish assemblage structure in two rivers of the wet tropics of northern Queensland, Australia. Environmental Biology of Fish 42(2): 181-199.

Larson, H. 2012. Ambassis miops. The IUCN Red List of Threatened Species. Version 2015.1. . Downloaded on 11 June 2015.

Pusey B., Kennard M. & Arthington A. (2004) Freshwater Fishes of North-Eastern Australia. CSIRO Publishing, Collingwood, Victoria.

Pusey, B.J., M.G. Read & A.H. Arthington. 1995. The feeding ecology of freshwater fishes in two rivers of the Australian wet tropics. Environmental Biology of Fish 43(1): 85-103.

Quick Facts


CAAB Code:37310014

Conservation:IUCN Least Concern

Depth:0-2 m

Habitat:Coastal freshwater, brackish streams

Max Size:10 cm TL

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