A red, star-shaped creature clinging to rocky shores,
slowly moving its five arms in search of prey,
a familiar symbol of the cold North Atlantic.

Asterias rubens, commonly known as the common sea star or red sea star, is one of the most well-known starfish species along European and North Atlantic coastlines.

---

📌 Basic Information

• Scientific Name: Asterias rubens
• Phylum: Echinodermata (Class: Asteroidea)
• Habitat: North Atlantic, North Sea, Baltic Sea coasts
• Size: Arm length typically 10–20 cm

It can be found from intertidal zones down to moderately deep waters.

---

⭐ Physical Characteristics

✔️ Usually five arms
✔️ Red, orange, or brown coloration
✔️ Rough surface with small spines
✔️ Numerous tube feet on the underside

The tube feet help it cling to rocks and capture prey.

---

🌊 Ecology & Feeding Behavior

Asterias rubens is a carnivorous predator.

• Primarily feeds on mussels and other bivalves
• Wraps its arms around prey and forces the shell open
• Performs external digestion before consuming its meal

It is sometimes considered a pest in mussel farms due to its feeding habits.

---

🌿 Role in the Ecosystem

✔️ Regulates populations of shellfish
✔️ Important component of the marine food web
✔️ Helps maintain balance in coastal ecosystems

Population increases can significantly affect shellfish communities.

---

Asterias rubens is:

⭐ A representative sea star of European waters
🌊 A predator of shellfish
🌿 A key regulator in coastal ecosystems

Moving slowly beneath cold ocean waters,
this red sea star stands as a remarkable example of marine life shaped by evolution and environment.