Hyporhamphus quoyi (Valenciennes, 1847)

Zainal Abidin, Danial Hariz, Lavoué, Sébastien, Mohd Abu Hassan Alshari, Norli Fauzani, Mohd. Nor, Siti Azizah, A. Rahim, Masazurah & Mohammed Akib, Noor Adelyna, 2021, Ichthyofauna of Sungai Merbok Mangrove Forest Reserve, northwest Peninsular Malaysia, and its adjacent marine waters, Check List 17 (2), pp. 601-631 : 620

Hyporhamphus quoyi (Valenciennes, 1847)

Figure 2I

Material examined. MALAYSIA • 3, 125– 136 mm TL; Kedah State, Kuala Kedah, Kuala Muda Whispering Market ; 05.578°N, 100.341°E; 6 Dec. 2018; Danial H. Zainal Abidin, Norli F.M.A.H. Alshari leg.; USMFC (105) 00001 . • 1, 151 mm TL; Kedah State, Kampung Batu Lintang, Pompang Batu Lintang ; 05.625°N, 100.394°E; 17 Jul. 2019; Sébastien Lavoué leg.; USMFC (105) 00005 .

Identification. Maximum TL (from the upper jaw tip) reported about 300 mm. Body elongate and rounded in cross section, with elongated lower jaw, about twice longer than head length; short round upper jaw with rounded tip; caudal fin unevenly forked (lower lobe about 25% longer than upper lobe); gill rakers on first gill arch 26– 34; body flanks and ventral part silver, dorsum greenish/ greyish; yellowish silver stripe on mid-lateral body.

Hyporhamphus quoyi is distinguished from H. dussumieri by its proportionally shorter lower jaw (contained>6 times in SL) and the rounded tip of its upper jaw. Hyporhamphus quoyi is a common coastal species in this region regularly frequenting estuary. This species was not reported in the mangrove estuary of Sikao Creek ( Tongnunui et al. 2002).