Both can change their colors to blend with their environment by a mechanism called camouflage.The common predators of them are whales, seals, fishes, moray eels, sea stars and several species of birds.Poisons of most squid and octopus are too weak to harm humans.They can swim in any direction and can change course quickly. They have beaks that help to kill and tear the prey.Both have blue blood since the oxygen-carrying pigments contain copper.They are cephalopod mollusks that live in the sea.Squid and octopus are cephalopods with a prominent head surrounded by tentacles.Two fins are present on the head, which are used to swim at low speed. Also, it has a flexible, stiff backbone called the pen. Squid refers to an elongated, fast-swimming cephalopod mollusk with eight arms and two long tentacles, typically able to change color. Squid – Definition, Facts, Characteristics Key Terms: Backbone, Fins, Head, Octopus, Squid, Tentacles What is the Difference Between Squid and Octopus What are the Similarities Between Squid and OctopusĤ.
Squids live in the open ocean while octopus lives on the sea floor in dens. It is surrounded by a ring of tentacles with suckers. Squid and octopus are cephalopods or head-footed animals whose head is the most prominent structure of the body. The main difference between squid and octopus is that squid has a stiff backbone-like structure, eight short and two long tentacles, and two fins on their triangular head whereas octopus has no backbone, eight tentacles, and a round head.
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