The answer to both questions ni kwamba.
Baada ya kuwekewa chumvi na kuona wanaanza kudehydrate, as a defence mechanism wataproduce alot of mucous ili ile chumvi iondoke mwilini/kwenye ngozi.
But this makes matters worse, kwavile ile chumvi itadisolve kwenye ile mucous na kutengeneza a solution yenye a high concentration of sodium/chumvi na hii inawafanya wadehydrate zaidi na kunyauka, since maji yote yanawatoka mwilini. Hii ni kwavile water/liquid molecules huwa zinamove from a less concentrated solution to a more concentrated solution ili kuleta balance, hii process ndo inaitwa osmosis.
So basically the protection doesn't work and therefore wanakufa kwavile wanakuwa wamelose maji yote ndani ya mwili wao.