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Fish Species in Mekong Rises in the eastern Tibethan Plateau, passes through China, Myanmar, Laos PDR, Thailand and Kampuchea before it drains into the South China Sea (Ref. 6318). The river has been divided into three portions: The Upper Mekong from the watershed southward to north of Chiangsae, Thailand; the Middle Mekong, from Chiangsaen to the Khone Falls (LeePee) of southern Laos PDR; and from then the Lower Mekong until reaching the delta. The water level of the Mekong changes seasonally by 10-20 m, being highest during the summer in northern areas and lowest in April in souther areas | |||||
| [No. of Species listed in Fishbase.org=773] | |||||
| Species | Family | Habitat | Length (cm) | Trophic level | Status |
| Aaptosyax grypus | Cyprinidae | demersal | 159 TL | 4.5 | endemic |
| Abbottina rivularis | Cyprinidae | benthopelagic | 11 TL | 3.0 | native |
| Acanthocobitis zonalternans | Balitoridae | demersal | 10 TL | 2.6 | native |
| Acanthopsoides delphax | Cobitidae | demersal | 8 TL | 3.5 | native |
| Acanthopsoides gracilentus | Cobitidae | demersal | 8 TL | 3.5 | native |
| Acanthopsoides gracilis | Cobitidae | demersal | 7 TL | 3.6 | native |
| Acanthopsoides hapalias | Cobitidae | demersal | 6 TL | 2.8 | native |
| Acanthopsoides molobrion | Cobitidae | demersal | 6 TL | 3.5 | native |
| Acantopsis choirorhynchos | Cobitidae | demersal | 30 TL | 3.5 | native |
| Acantopsis dialuzona | Cobitidae | demersal | 31 TL | 3.5 | native |
| Acentrogobius caninus | Gobiidae | demersal | 13 TL | 3.3 | native |
| Acentrogobius chlorostigmatoides | Gobiidae | pelagic | 11 TL | 3.0 | native |
| Acentrogobius viridipunctatus | Gobiidae | demersal | 10 TL | 3.0 | native |
| Acheilognathus barbatulus | Cyprinidae | benthopelagic | 7 TL | 2.9 | native |
| Acheilognathus deignani | Cyprinidae | benthopelagic | 12 TL | 3.0 | native |
| Achiroides leucorhynchos | Soleidae | demersal | 10 TL | 3.5 | native |
| Achiroides melanorhynchus | Soleidae | demersal | 18 TL | 3.5 | native |
| Akysis brachybarbatus | Akysidae | benthopelagic | 5 TL | 3.0 | native |
| Akysis ephippifer | Akysidae | demersal | 4 TL | 2.7 | native |
| Akysis inermis | Akysidae | demersal | 5 TL | 3.0 | native |
| Akysis leucorhynchus | Akysidae | benthopelagic | 4 TL | 3.0 | native |
| Akysis maculipinnis | Akysidae | benthopelagic | 4 TL | 3.0 | native |
| Akysis recavus | Akysidae | benthopelagic | 5 TL | 3.0 | native |
| Akysis similis | Akysidae | benthopelagic | 5 TL | 3.0 | native |
| Akysis sinensis | Akysidae | benthopelagic | 5 TL | 3.0 | native |
| Akysis subtilis | Akysidae | benthopelagic | 5 TL | 3.0 | endemic |
| Akysis variegatus | Akysidae | demersal | 5 TL | 3.0 | native |
| Akysis varius | Akysidae | benthopelagic | 5 TL | 3.0 | native |
| Albulichthys albuloides | Cyprinidae | benthopelagic | 36 TL | 3.0 | native |
| Allenbatrachus grunniens | Batrachoididae | demersal | 30 TL | 3.7 | native |
| Ambassis buruensis | Ambassidae | demersal | 9 TL | 3.4 | native |
| Ambassis gymnocephalus | Ambassidae | demersal | 16 TL | 3.2 | native |
| Ambassis kopsii | Ambassidae | demersal | 11 TL | 3.5 | native |
| Amblyceps foratum | Amblycipitidae | benthopelagic | 0 TL | native |
| Amblyceps mangois | Amblycipitidae | benthopelagic | 16 TL | 3.2 | native |
| Amblyceps mucronatum | Amblycipitidae | benthopelagic | 0 TL | native |
| Amblyceps serratum | Amblycipitidae | benthopelagic | 0 TL | native |
| Amblypharyngodon chulabhornae | Cyprinidae | benthopelagic | 5 TL | 3.0 | native |
| Amblyrhynchichthys truncatus | Cyprinidae | benthopelagic | 49 TL | 2.4 | native |
| Amoya moloanus | Gobiidae | demersal | 6 TL | 4.5 | native |
| Anabas testudineus | Anabantidae | demersal | 25 TL | 3.6 | native |
| Anguilla bicolor bicolor | Anguillidae | demersal | 100 TL | 3.6 | native |
| Anguilla marmorata | Anguillidae | demersal | 200 TL | 3.3 | native |
| Annamia normani | Balitoridae | demersal | 10 TL | 3.2 | native |
| Anodontostoma chacunda | Clupeidae | pelagic | 22 TL | 3.0 | native |
| Anodontostoma thailandiae | Clupeidae | pelagic | 22 TL | 3.3 | questionable |
| Aplocheilus panchax | Aplocheilidae | benthopelagic | 9 TL | 3.2 | native |
| Apocryptodon madurensis | Gobiidae | demersal | 9 TL | 3.0 | native |
| Arius caelatus | Ariidae | demersal | 45 TL | 4.0 | native |
| Arius maculatus | Ariidae | demersal | 80 TL | 3.8 | native |
| Arius sagor | Ariidae | demersal | 45 TL | 4.0 | native |
| Arius sona | Ariidae | demersal | 92 TL | 4.0 | native |
| Arius stormii | Ariidae | demersal | 50 TL | 4.0 | native |
| Arius thalassinus | Ariidae | demersal | 185 TL | 3.1 | native |
| Arius truncatus | Ariidae | demersal | 52 TL | 3.1 | native |
| Arius venosus | Ariidae | demersal | 30 TL | 4.0 | questionable |
| Aulopareia janetae | Gobiidae | demersal | 8 TL | 3.2 | native |
| Auriglobus nefastus | Tetraodontidae | demersal | 16 TL | 4.5 | native |
| Awaous grammepomus | Gobiidae | benthopelagic | 19 TL | 3.3 | native |
| Badis badis | Nandidae | benthopelagic | 8 TL | 3.3 | native |
| Badis ruber | Nandidae | benthopelagic | 0 TL | native |
| Bagarius bagarius | Sisoridae | benthopelagic | 39 TL | 3.7 | native |
| Bagarius suchus | Sisoridae | demersal | 74 TL | 4.5 | endemic |
| Bagarius yarrelli | Sisoridae | demersal | 244 TL | 3.7 | native |
| Bagrichthys macracanthus | Bagridae | demersal | 31 TL | 3.1 | native |
| Bagrichthys macropterus | Bagridae | demersal | 30 TL | 3.4 | native |
| Bagrichthys obscurus | Bagridae | demersal | 31 TL | 3.1 | native |
| Balantiocheilos melanopterus | Cyprinidae | benthopelagic | 43 TL | 3.0 | native |
| Balitora annamitica | Balitoridae | demersal | 12 TL | 2.5 | native |
| Balitora lancangjiangensis | Balitoridae | demersal | 9 TL | 2.4 | native |
| Balitora meridionalis | Balitoridae | demersal | 10 TL | 2.4 | native |
| Bangana behri | Cyprinidae | benthopelagic | 60 TL | 2.0 | native |
| Bangana elegans | Cyprinidae | benthopelagic | 42 TL | 3.0 | native |
| Bangana lippus | Cyprinidae | benthopelagic | 20 TL | 3.0 | native |
| Bangana sinkleri | Cyprinidae | benthopelagic | 9 TL | 3.0 | native |
| Barbichthys laevis | Cyprinidae | benthopelagic | 30 TL | 2.8 | native |
| Barbichthys nitidus | Cyprinidae | benthopelagic | 31 TL | 2.0 | native |
| Barbodes balleroides | Cyprinidae | benthopelagic | 30 TL | 2.9 | native |
| Barbodes cogginii | Cyprinidae | benthopelagic | 27 TL | 3.0 | native |
| Barbodes exiguus | Cyprinidae | benthopelagic | 33 TL | 2.8 | native |
| Barbodes huangchuchieni | Cyprinidae | benthopelagic | 33 TL | 2.8 | native |
| Barbodes parvus | Cyprinidae | benthopelagic | 33 TL | 2.8 | native |
| Barbonymus altus | Cyprinidae | benthopelagic | 25 TL | 2.4 | native |
| Barbonymus gonionotus | Cyprinidae | benthopelagic | 41 TL | 2.5 | native |
| Barbonymus schwanenfeldii | Cyprinidae | benthopelagic | 43 TL | 2.9 | native |
| Barilius barna | Cyprinidae | benthopelagic | 15 TL | 3.0 | native |
| Barilius caudiocellatus | Cyprinidae | benthopelagic | 15 TL | 3.0 | native |
| Barilius huahinensis | Cyprinidae | benthopelagic | 15 TL | 3.0 | native |
| Barilius nanensis | Cyprinidae | benthopelagic | 9 TL | 2.8 | native |
| Barilius ornatus | Cyprinidae | benthopelagic | 15 TL | 3.0 | native |
| Barilius pulchellus | Cyprinidae | benthopelagic | 14 TL | 3.4 | native |
| Bathygobius fuscus | Gobiidae | demersal | 12 TL | 3.4 | native |
| Batrachocephalus mino | Ariidae | demersal | 25 TL | 4.0 | native |
| Batrachomoeus trispinosus | Batrachoididae | reef-associated | 30 TL | 3.7 | native |
| Belodontichthys dinema | Siluridae | demersal | 86 TL | 4.5 | native |
| Belodontichthys truncatus | Siluridae | demersal | 48 TL | 3.9 | native |
| Betta prima | Belontiidae | benthopelagic | 5 TL | 3.5 | native |
| Betta smaragdina | Belontiidae | benthopelagic | 7 TL | 3.3 | native |
| Betta splendens | Belontiidae | benthopelagic | 7 TL | 3.3 | native |
| Boesemania microlepis | Sciaenidae | benthopelagic | 122 TL | 4.0 | native |
| Boleophthalmus boddarti | Gobiidae | demersal | 22 TL | 3.5 | native |
| Boraras micros | Cyprinidae | benthopelagic | 2 TL | 2.6 | native |
| Boraras urophthalmoides | Cyprinidae | benthopelagic | 4 TL | 3.4 | native |
| Bostrychus sinensis | Eleotridae | demersal | 27 TL | 4.0 | native |
| Botia beauforti | Cobitidae | demersal | 31 TL | 3.6 | native |
| Botia berdmorei | Cobitidae | demersal | 17 TL | 3.2 | native |
| Botia caudipunctata | Cobitidae | demersal | 11 TL | 3.2 | native |
| Botia eos | Cobitidae | demersal | 11 TL | 3.5 | native |
| Botia helodes | Cobitidae | demersal | 37 TL | 3.3 | native |
| Botia lecontei | Cobitidae | demersal | 19 TL | 3.4 | native |
| Botia longidorsalis | Cobitidae | demersal | 10 TL | 3.2 | native |
| Botia longiventralis | Cobitidae | demersal | 13 TL | 2.8 | native |
| Botia modesta | Cobitidae | demersal | 31 TL | 3.4 | native |
| Botia morleti | Cobitidae | demersal | 10 TL | 3.6 | native |
| Botia nigrolineata | Cobitidae | demersal | 10 TL | 3.2 | native |
| Botia sidthimunki | Cobitidae | demersal | 7 TL | 2.9 | native |
| Botia splendida | Cobitidae | demersal | 13 TL | 3.1 | native |
| Botia superciliaris | Cobitidae | demersal | 19 TL | 3.2 | native |
| Brachirus harmandi | Soleidae | demersal | 13 TL | 3.5 | native |
| Brachirus orientalis | Soleidae | demersal | 37 TL | 3.5 | native |
| Brachirus panoides | Soleidae | demersal | 20 TL | 3.5 | native |
| Brachirus siamensis | Soleidae | demersal | 20 TL | 3.5 | native |
| Brachygobius aggregatus | Gobiidae | demersal | 6 TL | 3.4 | native |
| Brachygobius kabiliensis | Gobiidae | demersal | 3 TL | 3.4 | native |
| Brachygobius mekongensis | Gobiidae | demersal | 3 TL | 3.1 | native |
| Brachygobius sua | Gobiidae | demersal | 3 TL | 3.4 | native |
| Butis butis | Eleotridae | demersal | 15 TL | 4.0 | native |
| Butis koilomatodon | Eleotridae | demersal | 11 TL | 4.0 | native |
| Calamiana aliceae | Gobiidae | demersal | 5 TL | 3.7 | native |
| Caragobioides geomys | Gobiidae | demersal | 8 TL | 3.5 | native |
| Caragobius urolepis | Gobiidae | demersal | 11 TL | 3.5 | native |
| Carassius auratus auratus | Cyprinidae | demersal | 59 TL | 2.0 | native |
| Carinotetraodon lorteti | Tetraodontidae | benthopelagic | 8 TL | 3.5 | native |
| Catlocarpio siamensis | Cyprinidae | benthopelagic | 366 TL | 2.0 | native |
| Ceratoglanis pachynema | Siluridae | demersal | 35 TL | 3.3 | native |
| Ceratoglanis scleronema | Siluridae | demersal | 54 TL | 3.5 | native |
| Channa gachua | Channidae | benthopelagic | 25 TL | 3.8 | native |
| Channa lucius | Channidae | benthopelagic | 49 TL | 3.9 | native |
| Channa marulius | Channidae | benthopelagic | 183 TL | 3.0 | native |
| Channa melasoma | Channidae | benthopelagic | 37 TL | 4.5 | native |
| Channa micropeltes | Channidae | benthopelagic | 159 TL | 3.9 | native |
| Channa orientalis | Channidae | benthopelagic | 20 TL | 3.9 | native |
| Channa striata | Channidae | benthopelagic | 122 TL | 3.7 | native |
| Chanos chanos | Chanidae | benthopelagic | 220 TL | 2.0 | native |
| Chaudhuria caudata | Chaudhuriidae | benthopelagic | 6 TL | 3.3 | native |
| Chaudhuria fusipinnis | Chaudhuriidae | benthopelagic | 6 TL | 3.2 | native |
| Chela caeruleostigmata | Cyprinidae | pelagic | 9 TL | 3.2 | native |
| Chela laubuca | Cyprinidae | pelagic | 17 TL | 3.2 | native |
| Chitala blanci | Notopteridae | demersal | 147 TL | 3.7 | native |
| Chitala lopis | Notopteridae | demersal | 183 TL | 4.5 | native |
| Chitala ornata | Notopteridae | pelagic | 122 TL | 3.7 | native |
| Chonerhinos modestus | Tetraodontidae | demersal | 13 TL | 3.0 | native |
| Cirrhinus caudimaculatus | Cyprinidae | benthopelagic | 13 TL | 2.3 | native |
| Cirrhinus chinensis | Cyprinidae | benthopelagic | 44 TL | 2.9 | introduced |
| Cirrhinus cirrhosus | Cyprinidae | benthopelagic | 122 TL | 2.4 | introduced |
| Cirrhinus jullieni | Cyprinidae | benthopelagic | 25 TL | 2.5 | native |
| Cirrhinus lobatus | Cyprinidae | benthopelagic | 19 TL | 2.2 | endemic |
| Cirrhinus microlepis | Cyprinidae | benthopelagic | 80 TL | 2.4 | native |
| Cirrhinus molitorella | Cyprinidae | benthopelagic | 55 TL | 2.0 | native |
| Clarias batrachus | Clariidae | demersal | 47 TL | 3.3 | native |
| Clarias gariepinus | Clariidae | benthopelagic | 170 TL | 4.4 | introduced |
| Clarias macrocephalus | Clariidae | benthopelagic | 120 TL | 3.7 | native |
| Clarias meladerma | Clariidae | demersal | 34 TL | 3.9 | native |
| Clarias nieuhofii | Clariidae | demersal | 50 TL | 3.1 | native |
| Clupeichthys aesarnensis | Clupeidae | pelagic | 9 TL | 3.1 | native |
| Clupeichthys goniognathus | Clupeidae | pelagic | 11 TL | 3.1 | native |
| Clupeoides borneensis | Clupeidae | pelagic | 10 TL | 3.1 | native |
| Clupisoma sinensis | Schilbeidae | demersal | 38 TL | 3.9 | native |
| Cobitis laoensis | Cobitidae | benthopelagic | 11 TL | 3.3 | endemic |
| Coilia lindmani | Engraulidae | pelagic | 25 TL | 3.7 | native |
| Coilia macrognathos | Engraulidae | pelagic | 32 TL | 3.8 | native |
| Coius microlepis | Coiidae | benthopelagic | 55 TL | 3.5 | native |
| Coius quadrifasciatus | Coiidae | benthopelagic | 37 TL | 3.7 | native |
| Corica laciniata | Clupeidae | pelagic | 9 TL | 3.2 | native |
| Corica soborna | Clupeidae | pelagic | 5 TL | 3.0 | questionable |
| Cosmochilus cardinalis | Cyprinidae | demersal | 40 TL | 2.8 | native |
| Cosmochilus harmandi | Cyprinidae | benthopelagic | 100 TL | 2.0 | native |
| Cosmochilus nanlaensis | Cyprinidae | benthopelagic | 10 TL | 3.0 | native |
| Crossocheilus atrilimes | Cyprinidae | benthopelagic | 9 TL | 2.8 | native |
| Crossocheilus cobitis | Cyprinidae | benthopelagic | 15 TL | 2.4 | native |
| Crossocheilus kalliurus | Cyprinidae | benthopelagic | 7 TL | 2.0 | native |
| Crossocheilus oblongus | Cyprinidae | benthopelagic | 19 TL | 2.0 | native |
| Crossocheilus reticulatus | Cyprinidae | benthopelagic | 21 TL | 2.3 | native |
| Crossocheilus siamensis | Cyprinidae | benthopelagic | 20 TL | 2.0 | native |
| Cyclocheilichthys apogon | Cyprinidae | benthopelagic | 25 TL | 2.8 | native |
| Cyclocheilichthys armatus | Cyprinidae | benthopelagic | 29 TL | 3.4 | native |
| Cyclocheilichthys enoplos | Cyprinidae | benthopelagic | 91 TL | 3.2 | native |
| Cyclocheilichthys furcatus | Cyprinidae | benthopelagic | 74 TL | 3.7 | native |
| Cyclocheilichthys heteronema | Cyprinidae | benthopelagic | 15 TL | 3.0 | native |
| Cyclocheilichthys lagleri | Cyprinidae | benthopelagic | 19 TL | 3.4 | native |
| Cyclocheilichthys microlepis | Cyprinidae | benthopelagic | 40 TL | 3.4 | native |
| Cyclocheilichthys repasson | Cyprinidae | benthopelagic | 35 TL | 2.6 | native |
| Cynoglossus cynoglossus | Cynoglossidae | demersal | 20 TL | 3.5 | native |
| Cynoglossus feldmanni | Cynoglossidae | demersal | 31 TL | 3.5 | native |
| Cynoglossus lingua | Cynoglossidae | demersal | 45 TL | 3.5 | native |
| Cynoglossus microlepis | Cynoglossidae | demersal | 40 TL | 3.5 | native |
| Cynoglossus puncticeps | Cynoglossidae | demersal | 18 TL | 3.2 | native |
| Cynoglossus trulla | Cynoglossidae | demersal | 55 TL | 3.5 | native |
| Cyprinus barbatus | Cyprinidae | benthopelagic | 77 TL | 3.0 | native |
| Cyprinus carpio carpio | Cyprinidae | benthopelagic | 147 TL | 3.0 | introduced |
| Cyprinus carpio chilia | Cyprinidae | benthopelagic | 6 TL | 2.9 | native |
| Cyprinus daliensis | Cyprinidae | benthopelagic | 77 TL | 3.0 | native |
| Cyprinus intha | Cyprinidae | benthopelagic | 77 TL | 3.0 | questionable |
| Cyprinus longipectoralis | Cyprinidae | benthopelagic | 77 TL | 3.0 | endemic |
| Cyprinus megalophthalmus | Cyprinidae | benthopelagic | 77 TL | 3.0 | native |
| Danio aequipinnatus | Cyprinidae | pelagic | 15 TL | 3.2 | native |
| Danio albolineatus | Cyprinidae | benthopelagic | 8 TL | 3.3 | native |
| Danio annandalei | Cyprinidae | benthopelagic | 8 TL | 3.3 | native |
| Danio apopyris | Cyprinidae | benthopelagic | 5 TL | 3.1 | native |
| Danio chrysotaeniatus | Cyprinidae | benthopelagic | 9 TL | 3.4 | native |
| Danio fangfangae | Cyprinidae | benthopelagic | 9 TL | 3.3 | native |
| Danio gibber | Cyprinidae | benthopelagic | 8 TL | 3.3 | native |
| Danio laoensis | Cyprinidae | benthopelagic | 8 TL | 3.4 | native |
| Danio leptos | Cyprinidae | benthopelagic | 7 TL | 3.3 | native |
| Danio regina | Cyprinidae | benthopelagic | 8 TL | 3.2 | native |
| Danio roseus | Cyprinidae | benthopelagic | 5 TL | 2.9 | native |
| Danio salmonata | Cyprinidae | benthopelagic | 6 TL | 3.1 | native |
| Dasyatis laosensis | Dasyatidae | demersal | 205 TL | 3.5 | native |
| Datnioides pulcher | Coiidae | benthopelagic | 14 TL | 3.3 | native |
| Datnioides undecimradiatus | Coiidae | benthopelagic | 49 TL | 3.0 | native |
| Dermogenys pusilla | Hemiramphidae | pelagic | 9 TL | 3.4 | native |
| Dermogenys siamensis | Hemiramphidae | pelagic | 6 TL | native |
| Devario acrostomus | Cyprinidae | benthopelagic | 10 TL | 2.9 | native |
| Diptychus kaznakovi | Cyprinidae | benthopelagic | 70 TL | 3.0 | native |
| Discherodontus ashmeadi | Cyprinidae | benthopelagic | 17 TL | 3.3 | native |
| Discherodontus halei | Cyprinidae | benthopelagic | 11 TL | 3.0 | native |
| Discherodontus schroederi | Cyprinidae | benthopelagic | 14 TL | 2.9 | native |
| Doryichthys boaja | Syngnathidae | benthopelagic | 51 TL | 3.3 | native |
| Doryichthys contiguus | Syngnathidae | benthopelagic | 14 TL | 3.1 | native |
| Doryichthys deokhatoides | Syngnathidae | benthopelagic | 23 TL | 3.1 | native |
| Doryichthys martensii | Syngnathidae | benthopelagic | 19 TL | 3.2 | native |
| Eleotris fusca | Eleotridae | demersal | 26 TL | 4.0 | native |
| Eleotris melanosoma | Eleotridae | demersal | 32 TL | 3.8 | native |
| Eleutheronema tetradactylum | Polynemidae | pelagic | 200 TL | 4.4 | native |
| Epalzeorhynchos bicolor | Cyprinidae | demersal | 12 TL | 3.0 | native |
| Epalzeorhynchos frenatum | Cyprinidae | benthopelagic | 15 TL | 2.4 | native |
| Epalzeorhynchos munense | Cyprinidae | benthopelagic | 12 TL | 2.7 | native |
| Esomus longimanus | Cyprinidae | benthopelagic | 1 TL | 3.3 | native |
| Esomus metallicus | Cyprinidae | benthopelagic | 10 TL | 3.3 | native |
| Eugnathogobius siamensis | Gobiidae | demersal | 4 TL | 3.2 | questionable |
| Euristhmus nudiceps | Plotosidae | demersal | 33 TL | 3.9 | native |
| Exyrias puntang | Gobiidae | demersal | 16 TL | 3.5 | native |
| Favonigobius aliciae | Gobiidae | demersal | 5 TL | 3.7 | native |
| Garra cambodgiensis | Cyprinidae | benthopelagic | 19 TL | 2.4 | native |
| Garra cyrano | Cyprinidae | benthopelagic | 12 TL | 2.1 | native |
| Garra fasciacauda | Cyprinidae | benthopelagic | 14 TL | 2.4 | native |
| Garra fisheri | Cyprinidae | benthopelagic | 5 TL | 3.1 | native |
| Garra fuliginosa | Cyprinidae | benthopelagic | 22 TL | 2.3 | native |