Southeast Asia
The Mekong, Chao Phraya, and the rivers of Borneo, Sumatra, and Java — home to bettas, gouramis, rasboras, barbs, and many iconic community fish.
460 species · freshwater
Other regions in Asia
Black Dwarf Betta
FishBetta persephone
A velvety black pygmy betta from some of the world's most acidic swamps.
Black Imbellis
FishBetta siamorientalis
A tiny bubble-nesting betta with a blackish body and vivid red fin details.
Black Kuhli Loach
FishPangio oblonga
A slender, uniformly dark loach that loves company and hides in plain sight.
Black Lancer
FishBagrichthys hypselopterus
A deep-river Asian catfish with an impressively tall dorsal fin and bold personality.
Black-lined Loach
FishAmbastaia nigrolineata
A rare, sociable loach with bold racing stripes and fascinating group behaviors.
Blackline Rasbora
FishRasbora borapetensis
A peaceful schooling fish with a vivid red tail that really shines in a group.
Black Lizard Loach
FishBalitoropsis zollingeri
A flat-bodied stream crawler that hops and clings across rocks like no other loach.
Black Paradise Fish
FishMacropodus spechti
A close paradise fish relative that thrives where others struggle.
Black Rabbit Snail
InvertTylomelania zemis
A slow-moving, long-lived snail that grazes peacefully and breeds one giant baby at a time.
Black Sharkminnow
FishLabeo chrysophekadion
A dramatically dark, shark-shaped giant that outgrows most home tanks.
Black Snakehead
FishChanna melasoma
A compact, nocturnal predator built for dark, acidic forest streams.
Blacktail Catfish
FishHemibagrus wyckii
A river giant that sees humans as a threat. And acts on it.
Bleher's Rainbowfish
FishChilatherina bleheri
A brilliantly colored rainbowfish from one remote Indonesian lake, worth every bit of effort.
Blind Cave Loach
FishNemacheilus troglocataractus
A blind, cave-dwelling loach from a single Thai cave system.
Blind Cave Loach
FishSchistura jarutanini
A blind cave loach from Thailand that science knows from just 22 specimens.
Blotched Snakehead
FishChanna maculata
A predatory bruiser that breathes air and guards its young with fierce devotion.
Blue Botia
FishYasuhikotakia modesta
A sociable Mekong loach with vivid fins and a complex social life.
Blue danio
FishDanio kerri
A powder-blue schooling gem from the Malay Peninsula that's rarely seen but easy to keep.
Blue Hillstream Trout
FishOpsarius bernatziki
A fast, bold hillstream schooler with vivid blue flank bars and serious attitude.
Blue Leg Poso Shrimp
InvertCaridina cf babaulti
A delicate little shrimp from an ancient Indonesian lake with vivid blue legs.
Blue-lined Rasbora
FishTrigonopoma gracile
A delicate blackwater rasbora with variable color forms from Borneo's forest streams.
Blueline rasbora
FishRasbora einthovenii
A peaceful forest-stream rasbora with a charmingly crinkled lateral stripe.
Blue Neon Goby
FishStiphodon atropurpureus
A thumbnail-sized stream goby that grazes biofilm and occasionally vanishes into the sand.
Blue Neon Sheatfish
FishKryptopterus apogon
A massive river predator sometimes sold to unsuspecting buyers as a cute juvenile.
Boeseman's Rainbowfish
FishMelanotaenia boesemani
Two fish in one body: bold orange rear, cool blue-grey front.
Boomerang Barb
FishDesmopuntius foerschi
A tiny blackwater barb with bold vertical bars and a lively schooling personality.
Bornean Eye-spot Silver Shark
FishLabiobarbus ocellatus
A peaceful schooling cyprinid with a distinctive shoulder spot and shy streak.
Bornean Minnow
FishNematabramis borneensis
A slender Bornean minnow with notably long barbels and a bold lateral stripe.
Bornean Puffer
FishCarinotetraodon borneensis
A pint-sized Bornean puffer with outsized personality and a very limited range.
Bornean Rasbora
FishRasbora sarawakensis
A tiny, peaceful Bornean rasbora that's rarely seen but well worth seeking out.
Borneo Loach
FishPangio shelfordii
A patterned eel-loach from Borneo's blackwater forests, with surprising personality for its size.
Borneo Sucker
FishGastromyzon ctenocephalus
A tiny Bornean hillstream crawler with iridescent blue fins and bold spotted patterns.
Borneo Sucker
FishGastromyzon farragus
A tiny Bornean stream-clinger with a vivid red tail and bold territorial streaks.
Borneo Sucker
FishGastromyzon stellatus
A boldly spotted Bornean stream crawler that grazes rocks like a tiny vacuum.
Brittan's rasbora
FishRasbora brittani
A dainty, peaceful schooler that thrives in soft, shaded Southeast Asian-style setups.
Brown's Betta
FishBetta brownorum
A jewel of the peat swamps, with a glowing green flank spot unlike any other Betta.