As, however, the shape of holothurians compels them to lie upon one side (unless supported in burrows), it is not surprising that the locomotory podia are generally restricted to the functional ventral surface and are wanting dorsally or altered into nonlocomotory papillae.
Source: wiktionary
Locomotory and nonlocomotory muscles of four harbor seals (mass = 17.5-41 kg) were glutaraldehyde-perfusion fixed and samples processed for electron microscopy and analyzed by morphometry.
Source: wiktionary
Nonlocomotory single-celled photosynthesizers do exist, such as diatoms: they rely on turbulence (sometimes coupled with the manufacture of low-density oils) to reverse their inevitable tendency to sink to the bottom.
Source: wiktionary