giant octopus

noun7

1. •
   One of certain large sea creatures of the order Octopoda
2. •
   Haliphron atlanticus (giant Atlantic octopus)
3. •
   Enteroctopus spp.
4. •
   especially, Enteroctopus dofleini (giant Pacific octopus)
5. •
   A mythical or fictional large sea creature with features of an octopus
6. •
   (informal) Synonym of Kraken (Norse sea monster)
7. •
   (informal) Synonym of Cthulhu (Lovecraftian horror monster)