Feather Star
Crinoids(feather stars) have a mouth on their top surface that is surrounded by feeding arms. Their gut is u-shaped. Their anus is also located next to their mouthes. They share a fivefold symmetry pattern with most echinoderms except that feather stars usually have more than five arms. Feather Stars usually have a stem that is used to attach them to a substrate, but most are only attached at a young age, and by adulthood they detach and live freely.
Feather Stars respiratory system relies on diffusion to take oxygen from the water around it in the same way Sand Dollars do, even down to the tubed feet.
Feather Stars respiratory system relies on diffusion to take oxygen from the water around it in the same way Sand Dollars do, even down to the tubed feet.