Ochre Star

The Ochre Star, also known as the Purple Sea Star or Ochraceus Starfish, is a species of sea star found along the rocky shores of the Pacific coast of North America, ranging from Alaska down to Baja California. This species is known for its distinctive coloration, which can vary from bright orange and yellow to deep purple, depending on environmental conditions. The body of the Ochre Star is typically broad and flat, with five arms extending from a central disk, and it can reach a diameter of 16 inches, though most individuals are smaller, averaging around 10 inches across.

As a carnivore, the Ochre Star primarily feeds on mollusks, such as clams, mussels, and oysters, as well as other small invertebrates. It uses its tube feet, which are located on the underside of its arms, to pry open the shells of its prey. Once the shell is open, the Ochre Star extrudes its stomach out of its mouth to digest the food externally. This method of feeding allows the star to consume prey that is much larger than its mouth would otherwise allow. In aquariums, they are typically fed whole mussels, clams, or fish-based foods.
The Ochre Star plays a vital ecological role in intertidal ecosystems, acting as a top predator. It helps regulate populations of bivalves and other invertebrates, and its feeding habits can shape the structure of the community by preventing any one species from becoming too dominant. One of the most well-known ecological relationships of the Ochre Star is its role in controlling mussel beds. Without the Ochre Star, mussel populations can grow uncontrollably and smother other marine life.

This species is also notable for its regenerative abilities. If an arm is lost due to predation or injury, the Ochre Star can regenerate the arm, and in some cases, an entire new individual can grow from a severed arm if part of the central disk is intact. The Ochre Star has a lifespan of up to 20 years in the wild, though many individuals live shorter lives due to predation and environmental pressures.

Fun Facts:
Despite its spiny appearance, the Ochre Star is often seen as a keystone species in its ecosystem, meaning its presence and feeding behavior are crucial to maintaining biodiversity in intertidal zones.

The Ochre Star is able to regenerate lost arms, and in some cases, can even grow a whole new individual from a single arm if the central disk is intact.