<em>Squid is a unique and interesting animal with elongated bodies. These have two tentacles, eight arms in total and very large eyes. These belong to Phylum Mollusca. </em>
Squids have various adaptation in them. <u>These can change color. They can also create light by using the phenomenon of bioluminescence and can release ink to get rid of any potential threat like sharks etc.</u>
These have around three hearts. Each heart has a specific function to it. While their fins are used to gain oxygen from the water. They also have a very complex nervous system enclosed in a cartilaginous cranium. These invertebrates are assumed to very smart as well.
