1, from the tail. The tail of squid is triangular, just like an arrow, while the tail of cuttlefish is oval, which is easy to distinguish and obvious.

2. From the perspective of body structure. There is a big bone in the center of cuttlefish, which feels hard when pressed by hand, while squid has no bone and feels soft when pressed by hand.

3, the difference from the sucker on the antenna. Both cuttlefish and squid have ten touching feet, but the distribution of sucker on them is different. Among cuttlefish tentacles, there are four pairs of suckers on the shorter tentacles distributed in four rows, and the suckers on the longer tentacles are only available at the top. Squid tentacles, especially long tentacles, are all covered with suckers.

4. There is black ink in cuttlefish. When cuttlefish is dissected, black liquid will flow out, but squid does not.

5. From the taste point of view, cuttlefish meat is woody, while squid meat is chewy.

Extended data:

Cuttlefish is a mollusk in temperate, subtropical and tropical seas. When encountering enemies, it will spray ink to escape and take advantage of turbid sewage to leave. There are pigment vesicles in its skin, which will change color and size with its emotional changes. Mating in late spring, and laying fertilized eggs on wood chips or at sea to be hatched into small cuttlefish. Distributed in China, Korean, Japanese, Singaporean, China, Taiwan Province and China.