First, the fin

Name, form and sound. From the fish, the sound. Original meaning: the wing or paddle-like appendage of fish and some other aquatic animals) has the same original meaning and plays the role of propulsion, balance and guidance. According to its location, it can be divided into dorsal fin, gluteal fin, caudal fin, pectoral fin and ventral fin.

Such as: fin spines (spiny bones that support the thin film of fish fins). Also known as fin)

Composition: dorsal fin, fleshy fin, gluteal fin, ventral fin, fin, scale fin, fin, fin-type, implant fin, spinal fin, fish fin, caudal fin, fin spine and pectoral fin.

Second, tuna

1, the ancient names of sturgeon and bighead carp.

2. Tuna. The body is spindle-shaped, with a blue-black back and a gray abdomen. There are seven or eight small fins behind the dorsal fin and the anal fin. Animals that live in tropical oceans, eat small fish, etc.

3. The ancient name of the white sturgeon. Also known as elephant fish, swordfish and harp fish. Fishes, ACIPENSER. The body is spindle-shaped, bare without scales and bone plates. Dark gray or light gray. The head is big, the mouth is big and the eyes are small, and the kiss is sword-shaped and looks like a trunk. The operculum membrane is developed, such as elephant ears. It is a specialty of China.

Word combinations: Liu, Wang, Yu, Shu.

Extended data

First, the evolution of the shape of the fin (as shown in the figure)

1, fleshy fin [rü uqí]?

Fins on mollusks such as squid and cuttlefish, which are used to help swimming.

2. Abdominal fin [fü qí]?

The fins in the abdomen of fish, one on the left and one on the right, are organs that change direction and support the balance of the body.

Second, the font evolution of tuna (as shown in the figure)

1? [ shū wěi ]?

Smaller sturgeon fish.

2. Wang Wei? [ wáng wěi ]?

Fish name.