A sea lily, also called a feather-star (Class Crinoidea). These are marine bottom-dwelling animals closely related to starfishes, and are found from shallow waters to deep sea beds. One can sight these near rocky shores, where they remain attached to rocks or occasionally creep across the shore. The arms have grooves down which microscopic food is transported to the mouth in the centre.
Only about 600 crinoid species exist today (a really small number compared to other invertebrates); most of the once-abundant prehistoric species are now extinct.
Clicked in the shallow water of a tide pool at Majali, Karnataka.
Canon 550D (borrowed), 18-55mm lens @33mm
Full frame image
Will later post images from other angles to better explain the structure of this animal.
Thanks, C&C welcome.