Ecco the Dolphin

There are two spots high above water along the left and right walls of Origin Beach where there were once glyphs (Or some creature) that was removed from the game. However if you use your sonar against those walls you still get messages from them. The left one says: "We hear song in the ocean!" "We hear our kind in the sea!" "Never have we heard songs in the sea!" The right one says: "You sing our song under the waves - who are you?" "Could we sing in the sea? Could we live in the sea?" "Perhaps we will try!" Ed Annunziata explained that this was the answer to the question Ecco was asked in Home Bay "Why do Dolphins live in the sea?" Ecco was supposed to be talking to his prehistoric ancestors and convincing them to join him in the deep. Unfortunately they were removed to time constraints.