listening 2 1D

OK,I've got a سوال about Squidward and I need the answer.Now,if آپ ever read the SpongeBob book,"SpongeBob EXPOSED!",you probably know that listed on one of the pages,it clearly notes Squidward is an OCTOPUSE,not a squid.Here's the confusing part:if this is the case,why does Squidward only have six legs?Octopuses have EIGHT legs,last time I checked.Does anyone know what Squidward REALLY is یا did the book give out inaccurate information?
Remeber,if you're an extreme SpongeBob پرستار یا know somebody who is,ask them to answer this question.I would greatly appreciate it.Thank آپ for reading.