We report the occurrence of Channa diplogramma in the Valapattanam River in March 2013 and this study adds to the species record of C. diplogramma in terms of diversity and range distribution in the River Valapattanam and South India. 1. Introduction Freshwater snakehead fishes of the family Channidae have widespread distribution in the tropics , represented by 38 species, of which 35 are of the Asian genus Channa  and three of the African genus Parachanna [1, 3, 4]. The Western Ghats biodiversity of India extends along the west coast and is crisscrossed with many streams, which form the major rivers draining water to the plains of Peninsular India . The freshwater fish diversity in the Western Ghats hotspots is very high , with 320 species belonging to 212 endemic species 47% being under Threatened or Near Threatened categories and 23% being under Data Deficient or Not Evaluated categories . The Valapattanam River is one of the west-flowing Rivers in the Western Ghats region of India and the main tributaries are Srikandapurampuzha, Bavalipuzha, Venipuzha, and Aralampuzha. In this paper, we report the occurrence and biometric characteristics of C. diplogramma (Day 1865)  from the river Valapattanam, Western Ghats of Kerala, India. 2. Materials and Methods A specimen of C. diplogramma (Figure 1) was caught with an encircling net (length 50 meter; height 1.5 meter; mesh size 0.8？mm) from the River Valapattanam, northern Kerala (11.93° N, 75.30° E) on 15 March 2013. The morphometric measurements of the formalin-preserved specimen were measured with a Vernier calliper to the nearest 0.1 millimetres and weighed to the nearest 0.01 gram using an electric balance (Sartorius-GD-603). The morphometric measurements and meristic counts were made by following Ng et al. . Measurements of body parts are reported as percentage of standard length (%SL) and measurements of subunits of head are reported as percentage of head length (%HL). The specimen was preserved in 4% formaldehyde solution and deposited in the Museum of the Faculty of Fisheries, College of Fisheries, Kerala University of Fisheries and Ocean Studies, Panangad, Kerala, India (FRM-CH-DIP/2013-1). Figure 1: Channa diplogramma caught from the River Valapattanam (lateral view). 3. Results and Discussion Channa diplogramma was first described as Ophiocephalus diplogramma (Day 1865) based on one juvenile specimen (42？mm in length) collected near the mouth of the Cochin estuary in the port city of Cochin (Kerala, India). The close similarity of this juvenile specimen with C. micropeltes,
X. Li, P. Musikasinthorn, and Y. Kumazawa, “Molecular phylogenetic analysis of snakeheads (Perciformes: Channidae) using mitochondrial DNA sequences,” Ichthyological Research, vol. 53, pp. 148–159, 2005.
G. Prasad, K. Sabu, and P. V. Prathibhakumari, “The first report of the Malabar puffer, Carinotetraodon travancoricus (Hora & Nair, 1941) from the Neyyar wildlife sanctuary with a note on its feeding habit and length-weight relationship,” Journal on New Biological Reports, vol. 1, no. 2, pp. 42–46, 2012.
A. Benziger, S. Philip, R. Raghavan et al., “Unraveling a 146 years old taxonomic puzzle: validation of Malabar snakehead, species-status and its relevance for Channid systematics and evolution,” PLoS ONE, vol. 6, no. 6, Article ID e21272, 2011.
E. A. S. Adamson, D. A. Hurwood, and P. B. Mather, “A reappraisal of the evolution of Asian snakehead fishes (Pisces, Channidae) using molecular data from multiple genes and fossil calibration,” Molecular Phylogenetics and Evolution, vol. 56, no. 2, pp. 707–717, 2010.
M. Kottelat, “Fish of the Nam Theun and Xe Bangfai Basins, Laos, with diagnoses of twenty-two new species (Teleostei: Cyprinidae, Balitoridae, Cobitidae, Coiidae and Odontobutidae),” Ichthyological Exploration of Freshwaters, vol. 9, no. 1, pp. 1–128, 1998.
J. Ebanasar and V. Jayaprakas, “Length-weight relationship of the Malabar snakehehead Channa micropeltes from Pechipparai Reservoir, Kanyakumari District, Tamil Nadu,” Journal of the Inland Fisheries Society, vol. 37, no. 1, pp. 60–63, 2003.
D. Scot, J. W. Moore, L. Herborg, C. C. Murray, and N. R. Serrao, “A non-native snakehead fish in British Columbia, Canada: capture, genetics, isotopes, and policy consequences,” Management of Biological Invasions, vol. 4, no. 4, pp. 265–271, 2013.
E. A. S. Adamson, Influence of historical landscapes, drainage evolution and ecological traits on patterns of genetic diversity in South East Asian freshwater snakehead fishes [Ph.D. thesis], Queensland University of Technology, Brisbane, Australia, 2010.
B. M. Kurup and Ranjeeth, “Invasion of exotic fish population in Periyar Lake, Kerala: a hotspot of fish biodiversity,” in Proceedings of the Life History Traits of Freshwater Fish Population for Its Utilization in Conservation, NBFGR-NATP, AC-15, pp. 1–4, Lucknow , India, 2002.
B. M. Kurup, “Management plans to arrest the decline of freshwater fish diversity of Kerala,” in Endemic Fish Diversity of Western Ghats, A. G. Ponniah and A. Gopalakrishnan, Eds., pp. 164–166, NBFGR-NATP National Bureau of Fish Genetic Resources, Lucknow, India, 2000.