large-eye bream
largemouth bass
largenose fish
leaffish
leatherjacket
lefteye flounder
lemon shark
lenok
leopard danio
lightfish
limia
ling
ling cod
lionfish
livebearer
lizardfish
loach
loach catfish
loach goby
loach minnow
long-finned char
long-finned pike
long-whiskered catfish

longfin
longfin dragonfish
longfin escolar
longjaw mudsucker
longnose chimaera
longnose dace
longnose lancetfish
longnose sucker
loosejaw
Lost River sucker
louvar
luminous hake
lumpsucker
lungfish
lyretail
mackerel
mackerel shark
madtom
mahi-mahi
mahseer
mako shark
man-of-war fish
manefish

Manta Ray
marblefish
marlin
masu salmon
medaka
medusafish
megamouth shark
menhaden
merluccid hake
Mexican blind cavefish
Mexican golden trout
midshipman
milkfish
minnow
Modoc sucker
mojarra
mola
molly
monkeyface prickleback
monkfish
mooneye
moonfish
Moorish idol

mora
moray eel
morid cod
morwong
Moses sole
mosquitofish
mosshead warbonnet
mouthbrooder
Mozambique tilapia
mrigal
mudfish
mudminnow
mudskipper
mudsucker
mullet
mummichog
murray cod
muskellunge
mustache triggerfish
mustard eel