In the pitch-black and desolate depths of the ocean, organisms have evolved in special ways to survive. Some of them possess incredibly sharp vision to remain invisible to others. The lack of 'food' in the dark has led some creatures to develop huge mouths and highly elastic stomachs, while others even have to feed on waste! The deep sea is home to a diverse and mysterious array of organisms, allowing us to gain insights into the meaning of life, as recounted by science writer Dr. Karen Mak.