Difference between Kraken and Octopus

What is the difference between Kraken and Octopus?

Kraken as a proper noun is a colossal sea monster that attacks ships and sailors, often portrayed as an octopus or squid. while Octopus as a noun is any of several marine molluscs/mollusks, of the family octopodidae, having no internal or external protective shell or bone (unlike the nautilus, squid or cuttlefish) and eight arms each covered with suckers.

We hope you now know whether to use Kraken or Octopus in your sentence.