Yeah, this is a no sew amigurumi crochet pattern! I think few of us really like the sewing part of amigurumi. I love the goofy look of this octopus. When you use sport weight yarn the octopus will be around 7 cm (3 inch), with super bulky yarn he will be around 13 cm (5 inch).
You can find the free crochet pattern of this Octopus on the website of DIY Fluffies.