what is the fear of deep water called

The fear of deep water is called thalassophobia. It is a specific phobia of deep bodies of water such as the ocean, sea, and large lakes. Thalassophobia is different from aquaphobia, which is the fear of water itself. Thalassophobia can include fear of being in deep bodies of water, fear of the vast emptiness of the sea, fear of sea waves, aquatic creatures, and fear of distance from land. The fear must be persistent, excessive, and unreasonable, and the individual must feel this fear every time they are exposed to deep or open water. Symptoms of thalassophobia can include panic attacks, sweating, trembling, rapid heartbeat, and avoidance of water-related activities. Treatment for thalassophobia can include cognitive-behavioral therapy (CBT) and exposure therapy.