Sea pig

Scotoplanes, commonly known as the sea pig, is a genus of deep-sea holothurian echinoderm of the family Elpidiidae, order Elasipodida.
Members of the Elpidiidae have particularly enlarged tube feet that have taken on a leg-like appearance, and are the only instance of legged locomotion amongst the holothurians, using water cavities within the skin (rather than within the leg itself) to inflate and deflate the appendages.These legs, in conjunction with their large, plump appearance (about 6 inches/15 cm long) have suggested the common name "sea pig". There are other genera of Elpidiidae with a similar appearance that have also been referred to as "sea pigs".

The two leg lizard

The Mexican mole lizard (Bipes biporus), commonly known as the five-toed worm lizard, or simply as Bipes, is a species of amphisbaenian, which is endemic to Baja California, Mexico. It is one of four species of amphisbaenians that have legs. It should not be confused with the axolotl, a salamander (Ambystoma mexicanum), which is usually called ajolote in Spanish.
They are pink, lizard-like reptiles, 18–24 cm (7.1–9.4 in) snout-to-vent length and 6–7 mm (0.24–0.28 in) in width, that live for one to two years. Their skin is closely segmented to give a corrugated appearance, and like earthworms, their underground movement is by peristalsis of the segments. The forelegs are strong and paddle-like, while the hindlegs have disappeared, leaving behind only vestigial bones visible in X-rays.