Although no part of the lobster is known to be poisonous, certain pieces may contain contaminants, have a bad taste or have an unusual texture. Bones, digestive juices and shell fragments occupy the sac or stomach of a lobster.
It may be unpleasant for many people to consume particles and bones inside their soft lobster meat. The digestive juices of the stomach have an unpleasant taste but do not cause damage once consumed.