The makeup of both animals is similar, yet different. Facts suggest there to be 289 recognised species of octopus, and all species have distinct characteristics, from the giant octopus, which can grow up to 9 metres across, to the Wolfi, the world’s smallest octopus, which measures only 1.5 centimetres and weighs less than a gram. Size range: From 1 centimetre to as much as 9 metresĮasily the most bizarre creature in the sea, the octopus is a cephalopod of many talents, with DNA like that of no other animal. Squid, by contrast, possess a stiffer structure known as a pen, which acts like a flexible backbone that runs the length of the animal’s body and stabilises it whilst it’s swimming. Octopuses are famous for being without a stiff bone in their bodies, which enables them to be able to squeeze through tight gaps. UW360 takes a look at the incredible differences between octopuses and squid: Shell It’s much the same as the manatee and dugong case – animals similar enough to get the two mixed up, yet different when you dig deeper into their anatomy and how they function. Both are in the class Cephalopoda and inhabit the majority of the ocean – but each has their own physical differences, their own habitat preferences and unique behaviour. More arms, different shapes? It’s tough trying to get to the bottom of what exactly separates octopuses and squid.
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