Antarctic Sun Starfish
Also known as the wolftrap starfish, the Antarctic Sun starfish goes by its scientific name Labidiaster annulatus. With its 50 long and narrow arms, it gives the appearance of the Sun brimming with its rays. These arms also give the starfish its large size, with a diameter of up to 60 centimeters across. As its name indicates, it mostly lives in Antarctic waters, but populations also exist in the South Atlantic, such as in South Georgia and the South Sandwich Islands.
The Antarctic Sun starfish also has a predatory disposition, frequently climbing on top of rocks and spreading its arms into the surrounding water. Whenever small fish or marine invertebrates pass by, it lashes out and catches them before pulling them into its mouth. Because of its remote habitat, the Antarctic Sun starfish largely remains a mystery to marine biology to this day.
Australian Southern Sand Star
Also known by its scientific name, Luidia australiae, the Australian southern sand star counts as one of the more common starfish found around Australia and New Zealand. The Australian southern sand star has long and narrow arms, with most specimens having seven arms. This starfish typically has a dull brown color, with irregular patterns of either black or green spots. At its largest, it can grow up to 40 centimeters.
The Australian southern sand star also has a carnivorous diet, something that is referenced in its name. In particular, this starfish half-buries itself in the sand, allowing it to pounce on unsuspecting prey. Scientists have also observed it scavenging on the remains of other predators’ prey.