Octopuses can camouflage themselves perfectly in seconds, have have 9 brains (central brain + each arm is like it’s own mini brain), 3 hearts, blue blood, can re-grow arms, routinely edit their RNA sequences, hold grudges, etc. etc.

Total nerd for them - so fascinating!

Octopus suckers have chemoreceptors that allow an octopus to taste what it is touching

The suckers operate separately & reject octopus arms so they don’t get tangled. Their pressure can tear flesh

Some have neurotoxic, flesh-dissolving venom

Also, Truman is hilarious:

Octopuses...
change color depending on their mood

camouflage themselves, yet they are color blind (what?!)

hard beaks & a sharp ribbon of teeth called a radula on its tongue to drill a hole into thick-shelled prey

have intelligent & inventive ways to outsmart their predators: