Step 1 : Introduction to the question "What is thalassophobia?"
...Thalassophobia is a broad description of a condition featuring an irrational or exaggerated fear of the sea. The person suffering thalassophobia may have a more narrowed focus of his/her fear, such as fear of salt water, fear of large waves or a fear associated with distances from shore. Others may not fear the sea per se but rather have an irrational fear of sea creatures, even the small ones. Thalassophobia is more likely to appear in those who also have an exaggerated fear of drowning. Source: FearofNet.net