How do marine iguanas deal with the salt load that they get from drinking sea water and eating salty seaweed?

During the course of their feeding, marine iguanas ingest large amounts of salt water. They, like other iguanas, possess salt glands, located between their eyes and nostrils, which concentrate and remove salt. The salt is deposited in the nostril where it is subsequently ejected by a "sneezing" action. This ejection occurs periodically, and is also used to warn of intruders, especially over-inquisitive tourists. The spray often shoots up into the air and then falls back on the head, where it forms the white "wig" often seen on marine iguanas.