Cirri I and II, sometimes III, bear specialized setae to comb net-forming cirri for food particles. These are termed comb setae, which are thin spines bearing fine bristles, and card setae (also known as grapple setae).
Certain cirri of Cirri I and II, occasionally III, feature specialized appendages to capture food particles using a net-like structure. These are called comb setae, characterized by slender spines with fine hair-like projections, and card setae (also referred to as grapple setae).