Labidiaster radiosus, the fragile sticky ray star, is a large species of starfish in the family Heliasteridae and was first described by Lütken in 1871.

[1] It is found in the waters of southern South America to Sub-Antarctica and the Antarctic Peninsula.

[2] Labidiaster radiosus is a large starfish that can reach up to 40 cm (16 in) across, its color is variable in life, ranging from red-orange to purple and white.

[2] Labidiaster radiosus is found on rocky reefs in the waters of southern South America to Sub-Antarctica and the Antarctic Peninsula.

These develop into young sea stars with short, stubby arms.