Fill in the blanks to complete the sentences.
a. I am very big. I'm a mammal. I can swim fast and be 32 meters long. I'm a .
b. I have ten legs and I'm small. I walk sideways. I'm a .
c. I'm grey. I can swim very well. I am a mammal and very intelligent. I'm a .
d. I don't have arms or legs. I have only a long tail. My head looks like a horse. I'm a .
e. I have a shell. I'm very slow on land but fast in the water. I live many years. I'm a .
crabdolphinseahorsewhaleturtle
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