Biguan fish is a slender cuttlefish, also known as octopus, squid and octopus, which is a slender cuttlefish. Pen fish is nicknamed sea rabbit.
Squid is cuttlefish, because it is generally red everywhere, much like squid, but also bigger and longer, with an arrow-shaped tail fin behind it. In addition, two of the ten tentacles of squid are particularly long.
Octopus is octopus. The key difference between octopus and squid is that octopus has 8 feet, while squid and squid have 10 feet.
Physically, squid sold in the market is generally larger than squid and octopus. Octopus is the smallest. Squid is usually red and western when cooked.