Fish Riddle

Alive without breath;
as cold as death;
never thirsting, ever drinking;
clad in mail, never clinking.

Drowns on dry land,
thinks an island
is a mountain;
thinks a fountain
is a puff of air.

So sleek, so fair!
What a joy to meet!

We only wish
to catch a fish,
so juicy-sweet!

J R R Tolkien