Simple Animals: Sponges, Jellies, & Octopuses - Crash Course Biology #22 (Patreon)

Simple Animals: Sponges, Jellies, & Octopuses - Crash Course Biology #22

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so...