What is the impact of a diver's exhaled bubbles during a night dive?

The choice indicating that bubbles create disturbances and may startle marine life is correct because during a night dive, the underwater environment is typically quieter and more sensitive than during the day. The sudden appearance of bubbles can disrupt the natural behavior of marine organisms, causing them to flee or hide. Additionally, the presence of bubbles can alter the natural acoustics of the underwater environment, further startling wildlife that might not be accustomed to such disturbances during the calmer night hours.

Bubbles do not enhance visibility underwater; in fact, they can contribute to decreased visibility due to their reflective qualities and because they can stir up sediment. While bubbles are less visible at night, making them appear different in the dark, this is not their primary impact during a dive. The assertion that bubbles have no effect on the dive overlooks the influence they can have on both marine life and the diver's experience, particularly in terms of noise and movement in a sensitive ecosystem.