2319 Heterobranchus longifilis Helon_u2.jpg http://www.fishbase.org/images/species/Helon_u2.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Helon_u2.jpg Seegers, L. Helon_u7.jpg http://www.fishbase.org/images/species/Helon_u7.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Helon_u7.jpg Jean-Francois Helias / Fishing Adventures Thailand Helon_u9.jpg http://www.fishbase.org/images/species/Helon_u9.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Helon_u9.jpg Mody, K. Helon_ud.jpg http://www.fishbase.org/images/species/Helon_ud.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Helon_ud.jpg KMFRI Helon_u1.gif http://www.fishbase.org/images/species/Helon_u1.gif http://www.fishbase.org/images/thumbnails/gif/tn_Helon_u1.gif Mertens, P. Helon_u0.gif http://www.fishbase.org/images/species/Helon_u0.gif http://www.fishbase.org/images/thumbnails/gif/tn_Helon_u0.gif FAO