Mangroves are a group of salt tolerant species of trees which may provide protection in tsunamis, coastal errosions, as well as ecological services such habitats for small sea life, offering refuge from predation, and a food source https://cutt.ly/ltBUaWb  https://cutt.ly/4tBUEVx 

In the 2004 Asia tsunami, it is reported that 2 people lost their lives in a Sri Lankan village with a dense mangrove and scrub forest, but in a place that no longer has such protection, 6,000 people lost their lives.