Why are feather stars sticky?

Feather stars, or crinoids, have sticky tube feet located on their arms that help them capture food and adhere to substrates. These tube feet secrete a mucous substance that traps plankton and small particles, which are then moved toward the mouth for feeding. The stickiness also aids in stabilizing the feather star in its environment, allowing it to remain anchored against currents. This combination of feeding and stability is crucial for their survival in marine habitats.