魚

ayu; sweetfish

annual fish

fourspine sculpin (species of fish, Cottus kazika)

fish going downstream (to spawn)

dead fish

fish that moves into deeper waters (to avoid the cold)

anadromous fish (fish that migrates upstream, e.g. salmon)

live fish

Food, cooking

pickled fish

flying fish roe

fish which lives close to the surface

fish found in coastal waters

sargassum fish

milkfish (Chanos chanos)

firebrat (species of bristletail, Thermobia domestica)

catadromous fish (fish that migrates downstream, e.g. eel)

placoderms (extinct fishes of class Placodermi)

Chinese high fin banded shark (Myxocyprinus asiaticus); Chinese sucker

sharp-nosed sand goby (Favonigobius gymnauchen)

grey stingfish (Minous monodactylus)

telescopefish (Giganturidae spp., esp. species Gigantura chuni)

Chondrichthyes (class comprising cartilaginous fishes)

Osteichthyes (class comprising the bony fishes and sometimes their descendants, i.e. tetrapods)

snubnose brotula; armoured cusk (Hoplobrotula armata)

loach goby (Rhyacichthys aspro)

lumpfish (Cyclopterus lumpus); lumpsucker; henfish; sea hen

From a rakugo story; used ironically to poke fun at someone who makes an ignorant statement with confidence

Pacific saury is only good if it's from Meguro