Why cant cacti live by the ocean?

Cacti cannot thrive by the ocean primarily due to their specialized adaptations to arid environments, which include a need for well-drained soil and minimal moisture. Coastal areas often have high humidity and salt levels, which can be detrimental to cacti that are not equipped to handle such conditions. Additionally, cacti are adapted to survive prolonged droughts, whereas coastal ecosystems typically experience more consistent rainfall and moisture. These factors collectively make coastal habitats unsuitable for cacti.