Final answer:
Sea lilies and feather stars are suspension feeders that collect small food organisms along their feather-like arms. They use tube feet to move the captured food towards their mouth.
Step-by-step explanation:
Sea lilies and feather stars are suspension feeders, meaning they collect small food organisms along their feather-like arms. Both types of crinoid have tube feet which are used to move the captured food towards their mouth. Sea lilies are sessile, attaching their body to a stalk, while feather stars can actively move using their leg-like cirri. Feather stars typically inhabit shallow areas in subtropical and tropical waters.