Its diet includes brittle stars such as Ophiactis , sea urchins such as Tetrapygus niger and starfish such as Patiria .
Luidia magellanica is a large and aggressive specialist predator of other echinoderms .
Luidia magellanica 's diet includes brittle stars such as Ophiactis , sea urchins such as Tetrapygus niger and starfish such as Patiria .
Luidia magellanica is a large and aggressive specialist predator of other echinoderms .