Mild aquaphobia can be defined as unease or lack of confidence in swimming or getting into a body of water. One of the more common strategies for helping people overcome this disorder is to provide them with relevant and accurate information about how the human body naturally reacts when in water.
A common worry of people who have mild aquaphobia is that they will just sink like a rock the moment they step into a pool. The truth is, our bodies are actually designed to float. Our density is less than that of water (and much less than saltwater so we float more in the ocean), our bones have cavities, and our lungs have air sacs. These and other related features of our bodies enable us to be natural floaters. A good illustration of this is if you go face down into the water and hug your knees close to your chest with both arms, the water will push you upwards and you will float. The only way you'd really sink to the bottom is if your hands and feet are tied up and a rock or metal ball is attached to you.
A common tendency of people with mild aquaphobia when they're in the water is to tense up. When your muscles are tensed, it's more difficult to float and keep your head above water. Relaxing your body and performing gentle paddling strokes using your arms and legs will help you float.
Gradual exposures and swimming practices usually help people with mild aquaphobia change their attitude towards water activities. As they get more comfortable in the water, they gain confidence and would eventually get over their fear.