Estuary - The Meeting Place of The Sea and The River
An Estuary is the mouth of a river where the water of the river meets with the seawater. It is the place of meeting between the sea and a river. It is the place where a river ends its course.
Deep sea is full with weird looking animals. The lyre or harp sponge is one of them. It looks like a lyre, a Greek classical stringed musical instrument. In fact, it is try to imagine that thing is a living, breathing creature.