Pentaquarks and strange tetraquark mesons

We consider the interplay of the pentaquark states and strange tetraquark states in the decay Lambda(0)(b) -> K- J/psi p. Possible existence of (cs (cu) over bar)-states is taken up and their manifestation in the K- J/psi-channel is discussed. It is emphasized that these exotic mesons can imitate broad bumps in the pJ/psi-channel.