weasel (esp. the Japanese weasel, Mustela itatsi), mustelid (any mammal of family Mustelidae)

weasel (esp. the Japanese weasel, Mustela itatsi), mustelid (any mammal of family Mustelidae)

tiger shark (Galeocerdo cuvier)

goatsbeard brotula (species of ophidiiform fish, Brotula multibarbata)

false indigo (Amorpha fruticosa), bastard indigo, leadwort

cut in the skin caused by a vacuum formed by a whirlwind, mythical weasel-like creatures riding on whirlwinds and inflicting sharp, painless wounds

going round in circles, game of cat and mouse, pointless and repetitive back-and-forth...

not writing or visiting someone, road of the weasel

Japanese marten (Martes melampus), marten (any arboreal weasel-like mammal of genus Martes)

ferret

stoat (Mustela erminea), ermine, short-tailed weasel

mongoose

ferret badger (esp. the Chinese ferret-badger, Melogale moschata)

polecat (Mustela putorius), ferret, fitch

Korean yellow weasel (Mustela sibirica coreana)

Japanese weasel (Mustela itatsi)

not to write to or visit someone, road of the weasel (it is believed that if someone blocks the path a weasel, he will never take that path again)

snubnose brotula, armoured cusk (Hoplobrotula armata)

final emergency measure, final defence when one is cornered