  In this work we consider a Generalized Bronnikov-Ellis wormhole and the
tideless Morris-Thorne wormhole and we study the propagation of massive scalar
fields. We calculate the quasinormal frequencies using the WKB method and the
pseudospectal Chebyshev method and we show the presence of an anomalous decay
rate for the quasinormal modes in the Generalized Bronnikov-Ellis wormhole.
However, such anomalous behaviour is avoided for the fundamental mode in the
Morris-Thorne wormhole background.
