Imitation crab is formed to look like real crab legs. Imitation crab is made with a type of fish called surimi. Manufacturers add fillers, flavoring and color to surimi to mimic the taste, texture and color of real crab legs.Imitation crab meat is a versatile ingredient that costs far less than the real thing.The meat can be used in many dishes and contains certain nutrients that are essential in a healthy diet.anufacturers add fillers, flavoring and color to surimi to mimic the taste, texture and color of real crab legs. Imitation crab meat is a versatile ingredient that costs far less than the real thing. The meat can be used in many dishes and contains certain nutrients that are essential in a healthy diet.