引っ張り蛸[hipparidako] being very popular
茹で蛸[yudetako] octopus (boiled)
蛸焼き[takoyaki] octopus dumplings
蛸入道[takonyuudou] octopus
蛸坊主[takobouzu] man with a bald or shaven head

蛸足[takoashi] many-legged
蛸足配線[takoashihaisen] overloading an electrical circuit
蛸配当[takohaitou] bogus dividend
蛸壺[takotsubo] octopus pot

ムール貝[muurugai] moule
一枚貝[ichimaigai] univalve
烏貝[karasugai] cockscomb pearl mussel (Cristaria plicata)
貝ボタン[kaibotan] mother-of-pearl button
貝貨[baika] shell money

貝がら[kaigara] shell
貝柱[kaibashira] adductor muscle
貝毒[kaidoku] shellfish poison
貝類[kairui] shellfish