In Negative Buoyancy, a short film conceived as an undergraduate thesis in 2020 - 2021 and directed by Delfi Dimitra under the guidance of Chalkou Maria, a freediver is shown dissolving into the underwater realm. The act of diving becomes a transformation, a deliberate embrace of negative buoyancy that lets the human body move from surface subject to integrated element of the seascape.

The film uses underwater cinematography that favors natural light and deep blue color grading to render the ocean as both vast and intimate. Long takes and slow pacing allow the viewer to follow the diver's economy of motion, while silhouettes against the light at the surface create a timeless feeling of suspension. Technically the production negotiates the constraints of filming beneath the surface, balancing camera housings, controlled buoyancy and careful choreography to capture breath, bubble trails and the subtle play of rays through water.

Sound design is crucial to the film's mood. Breath, muffled impacts and stretches of near silence sculpt the rhythm, making the viewer aware of physiological limits and mental surrender. Visually and aurally the diver reads like a marine predator and a meditative explorer at once, a tension that the editing underscores through alternating moments of stalking motion and contemplative stillness.

As a student project, the work displays measured experimentation and a mature visual sensibility. It invites audiences to confront fear, to admire the discipline behind breath-hold diving, and to consider a way of life formed by the choice to sink, to yield to gravity and to find belonging in the deep blue.