CATDOLL : CATDOLL: Introduction to the family of squid

Introduction of Squididae

A family of cephalopods in the phylum Mollusca. A family of cephalopods, commonly known as squids. The eyes on both sides of the head are slightly smaller in diameter, and there is a membrane outside the eyes.

How long is a squid?

The largest squid known to man is 17 meters long (13 meters long tentacles) and 4 meters in circumference. This is the longest mollusk known so far.

All squids are good swimmers because they have a system that absorbs and pressurizes seawater. They can change color depending on their temperament and environment. If they encounter danger, they will release a cloud of water and then quickly escape from it.

The squid is an invertebrate belonging to the phylum Mollusca, class Cephalopoda, family Squididae. It has a small head and a slightly long cone-shaped body. Two fleshy fins are connected at the rear end of the body in a diamond shape. Its body is shaped like the head of a javelin, hence the name squid. It has 8 arms with 2 rows of suckers on them; it has 2 tentacles that cannot be completely retracted into the head and have 4 rows of suckers on them. The suckers have keratin rings. The inner shell is smaller and is a keratin flake. It has black, yellow and red pigment cells under the skin, which can change its body color to adapt to the environment. It is distributed along the coasts of northern and southern my country.

The squid with the largest output and the highest economic value is the Taiwan squid, commonly known as "squid", which is abundant in the waters south of the Taiwan Strait. In addition, the musket squid and the Japanese squid are also common. In addition to squid, there are many cephalopods living in the ocean, and they are also fast-swimming species. Among them, squid and squid are the most famous. Their meat is more delicious than squid, so countries around the world pay great attention to their fishing. Especially squid, which is abundant in the coastal areas of North Korea, Japan and other countries. The squid produced in my country is different from that produced in North Korea, Japan and other countries. It is called "squid" in taxonomy.

The head and trunk of the squid are very narrow and long, especially the trunk, which is very pointed at the end, and looks like the tip of a javelin. Moreover, it moves so quickly in the sea, so people call it the squid. The squid, also known as the squid, is the fastest swimming animal. Just by looking at their appearance, you can tell that they are good at swimming; the diamond-shaped fleshy fins are like sharp knives that pierce the sea water, and the streamlined body reduces the resistance of swimming. More importantly, all squids have a "rocket thruster" - the mantle cavity, which uses the principle of water spray to move the body forward. The trunk of the squid is wrapped with a sac-like mantle membrane, and inside the mantle is a cavity called the mantle cavity. Once filled with water, the entrance of the mantle cavity is buckled. The squid squeezes the mantle cavity hard, and the water in the cavity has nowhere to go, so it sprays out from the funnel under the neck. The reaction force of the water spray pushes the squid to move in the opposite direction.

In order to achieve high speed, the squid discarded its heavy outer shell during the evolution process and used a light and soft internal skeleton to support its body. The squid can swim at a speed of up to 50 kilometers per hour, and even up to 150 kilometers per hour when escaping. It is known as the "living torpedo in the sea". The squid can swim alternately in two postures. When it is full and there is no danger, it uses its diamond-shaped fins to paddle slowly, and its body moves forward in a wave-like and regular manner. When it encounters danger or predation, the squid turns its tail forward, turns its head and 10 tentacles to the tail, folds the tentacles tightly together, and moves forward by spraying water. At this time, the body becomes a graceful streamline with minimal resistance.

The most powerful type of squid can also perform the stunt of flying in the air. This type of squid is 16 cm long. When it leaps onto the crest of the wave at a very fast speed and slides into the air with the falling waves, its diamond-shaped fleshy fins become "wings" for stable flight. The squid can fly 7-8 meters high and then fall back into the sea. If it unfortunately lands on the deck, it will become a delicious meal for the old salesman of Hailian.

Squids live in the sea area not far from the shore. Every spring, when spawning, groups of squids swim to the shore to lay eggs. The eggs are wrapped in a rod-shaped, transparent gelatinous sheath. There are often many rod-shaped egg sheaths connected together at the base, attached to rocks or other objects, and the shape looks like a white flower, which is very beautiful.