? Squids belong to mollusks, which are a small group of invertebrates. As an invertebrate, squid has a prominent feature that it has no spine. However, they also have a structure similar to the bones of many terrestrial animals and humans, which is their bony inner shell. This structure is commonly known as cuttlebone. Although it is not easy to observe the bones of squid from the outside, their bony inner shell can be regarded as their bones. The bones
of squid are similar to those of other animals, which can play a protective role and also play a supporting role. When squid move in the water, they also need their bony inner shell to play a role. In fact, the bones of cuttlefish can also be used as a traditional Chinese medicine, which has a relatively high medicinal value.
above, the squid belongs to the class Cephalopoda of the phylum Mollusca and is a mollusk. Fishes refer to animals in the fish class. Fins are one of the structures on their bodies. Fins can play an important role when fish swim. Mollusks and fish are two animals that do not intersect. Although squid also live in water, they are not fish, so they do not have fins.
However, some squid do have fins, such as "rhomboid squid", which is one of the common squid. From the appearance, we can clearly observe their fleshy fins, and they are very developed, which can also play an important role in their movement. Of course, technically speaking, squid are not fish, so their fins can not be called fish fins.
