Can Elves die by hunger?

[Melephelwen]

Anyways, there was this deiena (have no idea what that is, so don't ask.) She was very beautiful (like Lúthien or so) and immortal. But only if she kept living like her specie. (Deiena's can't live in the sea, so when she threw herself into it she died. Elsehow she would have lived forever.

Okay, then I'll try again [img]smilies/wink.gif[/img]
I've looked through the book today, and I found out, that a deiena is some kind of a forest spirit.
This deiena (Lisen) was created with a small part of all of the gods (Nearly wrote 'books' - silly me! [img]smilies/rolleyes.gif[/img] ) She was very beautiful; and immortal - but only as long as she stayed on the earth (best with the forests) because deiena's dies if they touch the sea. [img]smilies/eek.gif[/img]
She couldn't go to the sea, because deiena's can't survive there; they would go outside their natural bounds. [img]smilies/frown.gif[/img]
Uhm... kinda forgot why I started writing this at all... hehe... [img]smilies/rolleyes.gif[/img]
Could it be something like the same with Elves?

(Hope I explained it better this time [img]smilies/biggrin.gif[/img] )