(a) Cockroach
(b) Star Fish
(c) Cuttle Fish
(d) Cat Fish
(b) Tube feet is the locomotory organ that occurs in star fishes. Tube feet are small tube-like projections on the underside (oral side) of echinoderms. They are part of the water vascular system of echinoderms. Tube feet are used to move, feed and breathe. They are arranged in grooves along the arms. They operate through hydraulic pressure.
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