“The splendors of the depths are known to a fortunate few, like this biologist tagging a giant Pacific octopus in Washington’s Puget Sound.”
Photograph from “Special Issue: Best of America”, September 2002, National Geographic magazine
An octopus really does turn white with fear.
If an octopus comes up from the deep too quickly, the pressure drop can turn it inside out.
Octopuses used to have shells...eons ago.
Octopuses aren’t very active. A quick fit of activity tires one out almost immediately.
It’s the copper that makes octopus blood blue.
The octopus mates only once.
Some octopuses turns bright red when they see food.
An octopus can change its color and texture so perfectly that it becomes almost identical to its background.
Some birds do indeed sing for pure pleasure.