Loach is not a mollusk.

Loaches belong to the phylum Chordata, which are vertebrates, while molluscs are invertebrates.

Compared with invertebrates, vertebrates are more advanced and have more complex body structures.

Specifically, loaches are different from molluscs in appearance.

Loaches have fins, while molluscs have shells or mantles.

Their movement methods are also different. Loaches use fins to move, while molluscs have specialized feet to help them move.

1. Is loach a mollusk? Loach is widely distributed in my country and can be seen in many places.

From a broad category perspective, they belong to the phylum Chordata and are vertebrates.

Compared with invertebrates, they are relatively advanced animals, and their body structures and regulatory mechanisms are also relatively complex.

Molluscs refer to a large category of invertebrates, also called "shellfish".

As invertebrates, they are a relatively lower type of animal, and their body structure is not complicated.

Therefore, as a vertebrate, loaches cannot be classified as molluscs.

To be specific, loaches belong to the order Cypriniformes of the bony fish class, which is a type of fish.

Compared with molluscs, loaches are different in many aspects.

From the appearance point of view, a common feature of molluscs is that they have shells or mantles, but loaches do not have this structure; similarly, loaches have fins and other unique structures of fishes. Molluscs do not have it.

From the perspective of movement methods, loaches use fins to move, while molluscs have specialized feet, which are their typical locomotion organs.

2. Are loaches a fish? As mentioned above, loaches belong to the Phylum Chordata and the Class Osteichthyes. From this, we can see that they are both vertebrates and fish.

Although the appearance of loach is not particularly similar to that of common fish, as one of the fishes, they also have some key characteristics.

Judging from the body structure and appearance, loaches also have fins, which they need to move when moving.

From the perspective of breathing method, loach also uses gills to breathe like other fish.

Furthermore, from the perspective of reproduction methods, fish adopt an oviparous reproduction method, and loaches also meet this characteristic.

It can be seen that loach is quite typical as a fish.