The Catala Seastar (Thromidia catalai) is a large tropical seastar species that belongs to the echinoderm family Mithrodiidae. This species is known to occur in the Indo-western Pacific region and has been recorded from various places including the Philippines, Guam, Papua New Guinea, New Caledonia, Indonesia, East Timor and the Great Barrier Reef in Australia. This seastar has five cylindrical arms that end in a conical point. It is white or pink in colour with scattered papillae and the arm tip is a dark orange or brown. It can be found living on coral reefs from depths of 10 to 50 metres.
The Catala Seastar (Thromidia catalai) has a maximum arm length of approximately 30cm.