according to this site,, they rest on their mantle ( all slow moving fish) http://animal-world.com/Aquarium-Coral-Reefs/Care-of-Tridacnid-Clams
when a silky is streched from end to end and eld at rest it assumes a natural position known as
The Geoduck squirts water. The rest just clam-up
The umbo on a clam is the oldest part of the shell and can typically be found at the hinge of the two shell halves, closest to where they join together. It is usually more elevated and centrally located compared to the rest of the shell. Observing the position of the umbo can help determine the age and growth pattern of the clam.
The rest position in a wave is the position where the particles of the medium are when they are not vibrating. It is the equilibrium position that the particles return to when there is no disturbance. In a transverse wave, the rest position is the position of the particles when the wave is not passing through.
The distance from the rest position of a wave to its crest is equal to the amplitude of the wave. Amplitude is the maximum displacement of a wave from its rest position.
A larger forehead compared to the rest of your face can be due to genetics, hairline shape, or the position of your eyebrows. It is a natural variation in facial features and is not necessarily a cause for concern.
The lowest point below the rest position of a wave is called the trough. The highest point above the rest position is called the crest.
The maximum height reached by a wave from its rest position is called the amplitude. It is the distance from the rest position to the highest point of the wave.
The distance from the rest position to a wave's crest is known as the amplitude. It represents the maximum displacement of a wave from its equilibrium position. This distance is measured vertically from the rest position to the highest point of the wave.
You will see a clam.
A rest position in a wave is where the medium remains without any disturbance. It represents the equilibrium position of the wave where there is no displacement of particles.
When the cardboard is at rest, it is not undergoing any motion or change in position. It is stationary and its position remains constant.