The 11 armed sea star lives in South Australia , new Zealand and in the cape peninsula .it’s the largest seastar in southern australia they are found under rocks,algae in pools and in low water levels. It eats oysters,mussels,snails,shrimp and other starfish. It’s scientific name is the Coscinasterias calamaria . it could be brown, blue , green , grey, mauve,white,cream or orange. It you cut off one of its arms it will grow into a new starfish. It’s arms could grow to be up to 30 cm. 11 armed starfish do not have gills instead they have a water vascular system. They have tube feet on the underside of their bodies which allows them to move around. This starfish has two stomachs the cardiac stomach eats the food outside the body then it transfers it to the pyloric stomach after the tube feet open the shell of it’s food . the cardiac stomach is extended to pull the food inside.
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Sunlight : without sunlight they would not be able to survive.
Some of the ways humans impact starfish is when humans go to the ocean, we step on them or when we go into the ocean and swim we destroy their habitat .
Humans also take starfish out of the water and take them home as souvenirs or make them into jewelry.
We are also polluting the water they live in. oil spills kill what the starfish
Sunlight : without sunlight they would not be able to survive.
Some of the ways humans impact starfish is when humans go to the ocean, we step on them or when we go into the ocean and swim we destroy their habitat .
Humans also take starfish out of the water and take them home as souvenirs or make them into jewelry.
We are also polluting the water they live in. oil spills kill what the starfish