Long, slender, and sinuous, the arms writhe like snakes. The snake star is a brittle star. Not a true sea star. Though it is a close relative. The disc is small. Only one to two centimetres across. But the arms can span fifteen centimetres. They are flexible. Capable of coiling around rocks and kelp stalks. Proportion is skewed. Reach is extensive. Structure dictates movement. The body is minimal. The limbs are maximal. Under rocks and in crevices, it hides during the day. The snake star is nocturnal. It emerges only after dark to feed. It wedges itself into gaps where predators cannot reach. During the day, it is still and silent. Its arms are tucked close to its body. At night, it unfolds. It stretches its arms into the water. Stillness is safety. Motion is risk. The cycle is tidal. The response is instinctive. Survival depends on concealment. The arms are its feeding tools. The snake star uses its long, flexible arms to sweep the seafloor. It catches small particles of detritus. It carries them towards its mouth. The mouth is on the underside of the disc. It is surrounded by five jaws. The arms are covered in tiny spines. These trap food particles. They direct them towards the mouth. Consumption is passive. Efficiency is high. The current brings food. The arm collects it. When threatened, the arms break. This is a defence mechanism. A brittle star that is grabbed by a predator will shed the captured arm. It leaves the arm writhing in the attacker's grasp. The rest of the animal escapes. The arm regenerates within weeks. It is a costly defence. But it works. Sacrifice ensures survival. Loss is temporary. Regrowth is certain. The predator is distracted. The prey survives. Rocky reefs and kelp forests provide its preferred habitat. The snake star lives from the low tide mark down to fifty metres depth. It occurs on reefs, in harbours, and in estuaries. It is most common in areas with complex rocky structure. These are the kinds of places with plenty of crevices to hide in. It is a common sight for night divers. Who see its arms waving in the beam of their torches. Complexity offers shelter. Simplicity offers exposure. The Māori name Pēwhā refers to its sinuous, snake-like movement. The arms twist and coil. They move with a grace that seems impossible for an animal with no obvious muscles. It is a fitting name for a creature that seems to flow rather than crawl. Language captures motion. Name reflects form. The description is precise. The observation is accurate. The connection is cultural. Climate change may affect it indirectly. Warming waters and ocean acidification may impact the planktonic larvae that drift before settling. The snake star is resilient. But it has limits. For now, it remains a common sight on rocky reefs. Hiding under rocks during the day. Unfurling its snake-like arms at night. Resilience is tested. Limits are unknown. The future is uncertain. The present is stable. No one told it otherwise. It carries on. The rock stays cold. The water stays dark. The arm extends. The cycle repeats. It is a quiet victory. No fanfare accompanies it. No celebration marks it. The snake star simply exists. It continues its work. It maintains its watch. And that seems to be enough.