C# (Visual C# Interactive Compiler), 153 bytes

foreach(var i in"Baby Daddy Mommy Grandpa Grandma".Split())Write(string.Concat(Enumerable.Repeat(i+" Shark doo doo doo doo doo doo\n",3))+i+" Shark!\n");

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C# (Visual C# Interactive Compiler), 153 131 bytes

foreach(var i in"Baby Daddy Mommy Grandpa Grandma".Split()){var a=i+" Shark doo doo doo doo doo doo\n";Write(a+a+a+i+" Shark!\n");}

Thanks to @Destrogio for saving 30 bytes!

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