Answer:
Salty water everywhere but not sea in sight.
Tall in the morning, short at noon, gone at night. But I'll be back soon.
Voiceless it cries, wingless flutters, toothless bites, mouthless mutters.
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
What goes in the water red, and comes out black?
What covers its face with its hands, speaks no language, yet most known what it's saying?