Wild Wednesday – Common sunstar
This week's Wild Wednesday shines a spotlight on one of the most striking marine residents of our coastal waters, the Common Sunstar, scientific name, Crossaster papposus. With its vibrant colours and sun-like shape, this sea star is a true jewel of the seabed and a fascinating predator in our marine ecosystems.
What is the Common sunstar?
The Common sunstar is a large, vividly coloured starfish that can grow up to 34 centimetres in diameter. It typically has 10 to 12 short, tapering arms.
Its upper surface has red, orange, and yellow patterns, with a pale yellow or white underside. Covered in small spines, resembling a sun, hence its name.
Habitat and behaviour
This species is found across all British coasts, including the South Coast of England, where it inhabits rocky and sandy sea beds, mussel beds, and oyster reefs from the low tide line down to depths of 50 metres.
It thrives in areas with strong water movement and is sometimes spotted in rock pools during low tide.
The Common sunstar is a greedy predator, feeding on other sea creatures such sea cucumbers and even other starfish. It's also known to scavenge, making it an important part of the marine clean-up crew.
Sightings in West Sussex
Recent marine surveys and biodiversity records confirm that the Common sunstar is present along the West Sussex coast, including areas near Knepp Wildlands Estate, where marine biodiversity continues to flourish.
The Sussex Wildlife Trust also highlights this species as part of its marine conservation efforts, noting its distinctive appearance and ecological role
While not always easy to spot due to its preference for deeper waters, local divers and marine enthusiasts have reported sightings near Selsey Bill, Pagham Harbour, and Littlehampton's coastal reefs - making it a hidden treasure of our district's underwater world.
Why it matters
The presence of the Common Sunstar in our waters is a sign of healthy marine biodiversity. As both predator and scavenger, it helps maintain balance in the ecosystem. Its striking appearance also makes it a favourite among underwater photographers and nature lovers.
Read more here: Common sunstar | The Wildlife Trusts