African glass catfish
African lungfish
aholehole
airbreathing catfish
airsac catfish
Alaska blackfish
albacore
alewife
alfonsino
algae eater
alligatorfish
Amago
American sole
Amur pike
anchovy
anemonefish
angel shark
angelfish
anglemouth
angler
angler catfish
anglerfish
Antarctic cod
Antarctic dragonfish

Antarctic icefish
antenna codlet
arapaima
archerfish
Arctic char
armored catfish
armored gurnard
armored searobin
armorhead
armorhead catfish
arowana
arrowtooth eel
aruana
Asian carp
Asiatic glassfish
Atka mackerel
Atlantic cod
Atlantic eel
Atlantic herring
Atlantic salmon
Atlantic saury
Atlantic silverside
Atlantic trout
Australasian salmon

Australian grayling
Australian herring
Australian lungfish
Australian prowfish
Ayu
Baikal oilfish
Bala shark
bambooshark
bandfish
bango
bangu
banjo catfish
barb
barbel
barbeled dragonfish
barbeled houndshark
barbelless catfish
barfish
barracuda
barracudina
barramundi
barred danio
barreleye
basking shark

Bass
basslet
bat ray
batfish
beachsalmon
beaked salmon
beaked sandfish
beardfish
beluga sturgeon
bengal danio
bent-tooth
betta
bichir
bigeye
bigeye squaretail
bighead carp
bigscale
bigscale fish
bigscale pomfret
billfish
bitterling