System Clue.
As soon as Sebastian started swimming through the water, into the deeper parts of the seamount, he did not forget to activate his always reliable skill, his advanced electroreceptors.
The deep background color of red in his surroundings which was of extreme contrast to his previous hunting ground made him feel unaccustomed to it.
As he swam, he suddenly stopped as he saw his system notification flash before his eyes.
[Due to your having reached the threshold of Level 10, you have unlocked a unique clue from the system.]
[Do you wish to access the unique clue now?]
Seeing this, he was stunned for a moment. "The heck! I actually forgot about this due to the euphoria brought by evolution".
He felt an urge to facepalm but he suddenly remembered that he was now a shark, making him feel a little awkward. Putting that behind him, he thought to the clue of the system.