Locomotion in Snake:
Snakes also use muscles for their locomotion. Four types of locomotion were identified in snakes. They are lateral undulation, rectilinear movement, concertina movement and sidewinding. In common lateral undulation mode, wave like muscle reflexion from head to tail results the locomotion.

Locomotion in Sea-anemone:
Bilateral sea-anemone moves by radial operation of radial pedal. Sea-anemone creeps in the direction of plane of symmetry.

Locomotion in fishes
Fishes swim by using their specialized locomotive organ fins. While moving the fins, the generated thrust help to move to the fish. With the help of multiple fins fishes can control the direction of movement.

Locomotion in cockroach
Cockroaches have wings as well as legs. Primarily they use the legs for the locomotion and as well as they can use the wings too for the locomotion.

Locomotion in Higher animals:
Large number of animals use limbs for their movement in which muscles are attached endoskeleton or exoskeleton. In vertebrates endoskeleton muscle system is present in which muscles are attached external portion of the bones (Figure.15.5.a). But in arthropods exoskeleton muscle system is present in which muscles are attached inside of the skeleton system (Figure 15.5.b)