What is a giant sea star?

The giant sea star, also known as the sunflower sea star (Pycnopodia helianthoides), is a large marine echinoderm found along the Pacific coast of North America. It can have up to 24 arms and can grow up to 3 feet in diameter, making it one of the largest sea stars. This species is known for its vibrant coloration and plays a crucial role in coastal ecosystems as a predator of sea urchins and other invertebrates. However, it has faced significant population declines due to diseases like sea star wasting syndrome.