I'm blue at day and black at night; I do contain some creatures born and died. What am I?

Answer: Sea water.

More Medium Riddles with answers

More Medium Riddles

I'm by nature solitary, scarred by spear and wounded by sword, weary of battle. I frequently see the face of war, and fight hateful enemies; yet I hold no hope of help being brought to me in the battle, before I'm eventually done to death. In the stronghold of the city sharp-edged swords, skilfully forged in the flame by smiths, bite deeply into me. I can but await a more fearsome encounter; it is not for me to discover in the city any of those doctors who heal grievous wounds with roots and herbs. The scars from sword wounds gape wider and wider; death blows are dealt to me by day and by night. What am I?
I'm clean when I'm black, Dirty when white; Get too close, And you might sneeze. What am I?
I'm done to the chief, And to the king too; A liquid formed to stone, I can hit and hurt you. What am I?
I'm far away from you, but I still shine bright. I sleep at day, I wake up by night. I stay by the moon, but never get close to it. What am I?
I'm first found in caves, now prolific online; I'm a depiction, a drawing, a symbol, or sign. I'll convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?
I'm first on earth, second in heaven, I appear twice in a week, and once in a year, I'm in the middle of the Sea. What am I?
I'm grown from darkness but shine with a pale light. Very round I am, and always a lady's delight. What am I?
I'm long but short. I can brake but bend. I can be wood, tape, and almost anything if you get me just right. What am I?
I'm made for one but meant for two; I can be worn for many years but usually just a few; You won't ever need me unless you say you do. What am I?
I'm named after nothing, though I'm awfully clamorous. And when I'm not working, your house is less glamorous. What am I?
I'm normally under you. Take away my first letter and I'm normally above you. Take away my first 2 letters and you normally can't see me. What am I?
I'm not an airplane, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?