What are the features of the structure and movement of the toothless in connection with the lifestyle.

Toothless is a mollusk that lives at the bottom of fresh water bodies. That leaves its mark on its structure and mode of movement.
Since the bottom of fresh water bodies is often muddy, it uses a wedge-shaped leg to move, which helps to dig right into the ground.
The shell of the toothless is bivalve, which allows you to keep the flaps ajar. Thanks to this, there is an uninterrupted flow of small crustaceans and algae through the system of upper and lower siphons.
It is also worth paying attention to the color of the shell, which allows perfect masking, thanks to the dark green color corresponding to the color of the silt.