North Pacific Seastar population decline?

The beautiful, but destructive North Pacific Seastar (Asterias amurensis) first arrived in Port Phillip Bay in the 1990s in ship ballast water. As they eat practically anything live or dead that they can climb onto, they thrived in the local conditions where they have few natural predators. In less than 10 years they became the [...]

Seastar survival strategy

Curiously, the Magnificent Biscuit Seastar Tosia magnifica is reported as relatively common in waters up to 5m in Victoria and Tassie, but is only found in deep water (to 200m) in South Australia. Just one more of those marine mysteries! But it may well be that this ability to use a range of depths will [...]