When starfish fall to the
bottom they are about 1 mm long. In the beginning they
mainly consume small barnacles and mussels that have also
just landed on the bottom. Under favourable circumstances
they reach a radius of 5 mm during the first month, and
reach 3-4 cm during the first year. Growth is dependant on
food and temperature, which makes it difficult to determine
their age by size.
Pictured starfish are between 1-1.5 mm
Primitive eye on the arm
At the tip of each arm is a pigmented marking that functions as a primitive
eye, and thus able to distinguish between light and dark.
Common sunstar and gulls eat starfish.
Within the fishing industry, the starfish is considered to be vermin,
because it competes with plaice and flounder for food, and it also attacks
fish caught in nets.
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