Any of several marine molluscs of the family Octopodidae, having no internal or external protective shell or bone (unlike the nautilus, squid and cuttlefish) and eight arms each covered with suckers.

To put (or attempt to put) one's fingers, hands or arms in many things or places at roughly the same time. / To spread out in long arms or legs in many directions.

The Australian octopus Octopus tetricus

Any of several species of umbrella octopuses of the genus Grimpoteuthis.

Any of four species of pelagic octopus of the genus Tremoctopus, found in tropical and subtropical oceans.

An octopus common to coastal waters worldwide, Octopus vulgaris

(informal) Synonym of Kraken (Norse sea monster) / (informal) Synonym of Cthulhu (Lovecraftian horror monster) / Haliphron atlanticus (giant Atlantic octopus) / Enteroctopus spp.

A tropical species of octopus, Amphioctopus marginatus.

An Indo-Pacific species of octopus, Thaumoctopus mimicus, capable of impersonating other species of marine life.

Heliotropium foertherianum, a flowering plant in the borage family, native to tropical Asia.