Hyporhamphus unifasciatus   (Ranzani,  1841) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Vaske Jr., T.

Size: Max length 30.0 cm TL (male/unsexed); common length 20.0 cm SL (male/unsexed).

Color: Sides and below light yellowish, back slightly greenish, a bluish lateral band bordered above by black. Scales of back with dusky edges. Anterior rays of dorsal fin and other rays of caudal fin dark, rest of fins little dusky. Pectoral, ventral and anal fins hyaline, tips of anterior rays of anal fin slightly dusky.

Entire head 2.7 in standard length, 3.2 in total length. Head from tip of upper jaw to hind margin of opercular flap about 3.3 in trunk. Body elongate, compressed, breadth of body about 1.4 in its depth. Depth of body about 10.6 in standard length, 11.3 in total length. Length of lower jaw beyond tip of upper jaw 5.6 in standard length, 6.4 in total length. Eye diameter 4.3 in head, about 1.6 in postorbital length of head and a little less than interorbital space. Upper jaw broader than long. Preorbital much shorter than eye. Jaws with 4-5 rows of teeth. Origin of anal fin opposite to that of dorsal fin. Distance between ventral and anal fins equal to distance between angle of jaws to gill opening. Length of anal fin base somewhat equal to that of dorsal fin. Pectoral fin slightly less than head without snout. Ventral fin more than half length of pectoral fin. Ventral fin origin nearer to gill opening than to base of caudal fin. Caudal fin moderately forked, lower lobe longer, median rays 1 ½ eye diameter. 35 predorsal scales.
Number of spines and rays in the dorsal fin: ii, 13; number of spines and rays in the anal fin: ii, 15; number of rays in the pectoral fin: i, 10; number of spines and rays in the ventral fins: i, 5; number of scale rows along the lateral line: 56.

Remarks: Values in above description denote proportions.

Synonym (s)
Hemiramphus richardi Valenciennes, 1847
(Junior synonym)
Hemiramphus unifasciatus Ranzani, 1841
(Senior synonym)
Hyporhamphus richardi (Valenciennes, 1847)
(Junior synonym)
Hyporhamphus tricuspidatus Gill, 1859
(Junior synonym)
Hemirhamphus unifasciatus Ranzani, 1842
Hyporhamphus unifasciatus Munro, 1955
Hemirhamphus unifasciatus Ranzani, 1841
Hyporamphus unifasciatus (Ranzani, 1841)

Common Name (s)
• Common Halfbeak (English)
• Oola (Malayalam)
Economic Importance and Threats
Importance:  Commercial, Dangers
(Fisheries, used as bait. Edible but not really appreciated.
Reported to cause ciguatera poisoning.)

Habitat:  Reef Associated, Estuarine
Trophic Level:  Secondary Consumer
Prey:  Phytoplankton, planktonic crustaceans, insects
Predator:  Acanthocybium solandri, Thunnus thynnus


• Lakshadweep, Agatti INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org
  • Jones, S and Kumaran, M (1980) Fishes of the Laccadive Archipelago The Nature Conservation and Aquatic Sciences Service, Trivandrum, Kerala 760 pp Available at - NIO, Goa
  • Jones, S. (1969) Catalogue of fishes from the Laccadive Archipelago in the reference collections of the Central Marine Fisheries Research Institute. Bulletin of Central Marine Research Institute CMFRI, Cochin 8 1-35 Available at - http://eprints.cmfri.org.in/569/1/Bulletin_8.pdf

Page last updated on:2011-03-08

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