Mabey one starfish had a problem and grew another leg. Then it gave birth and since its parents had extra legs that starfish will inherit the legs. That is how a lot of changing in species happen.
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there are about 2000 different kinds of sea stars or starfish in the ocean left
It's a common starfish. -- There is actually no such thing as a "starfish", as they are not fish. They are Sea Stars. There are many different kinds, but they are all sea stars and not starfish.
There are hundreds of different helicopters.
there are probably 100 diffrent kinds of starfish around the world
there are many different kinds and many different brands of hybrids
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scientists believe there are 118 different kinds of elements
As many as the sum of all the kinds of trees, shrubs, flowers, grasses, and all other kinds of plants that exist, whether known or unknown. Nobody knows how many there really are.
Very many.
There are actually thousands of different types and recipes for cookies from all around the world and throughout history.
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