It could be said that even adult octopuses "play". Don't remember. Yes :( [except one species iirc]. There's a decent-length section in the book about octopus

It could be said that even adult octopuses "play". Don't remember. Yes :( [except one species iirc]. There's a decent-length section in the book about octopus lifespan. I read this review and immediately ordered the book. Just finished reading it. I learned a lot. Worth a read. Thought provoking.