Why when peoples die in sea their body come up on sea?

Question

density of our bodys is more than density of water but when we die in water example sea our body come up on the sea. why? is there any gas in our body that produce after die or somthing else?

Answer 1

You have millions of capillaries in your body that carry blood to all cells. When they decompose, they fill with gas and expand. It is like a balloon and you float.

Answer 2

Even if we weren't dead... We can still float... right?? I think since a dead has no more conscious... they float...

Answer 3

You produce gas as you rot. This gets trapped inside you and makes you more buoyant. Eventually the gas is released and you sink.