This document proposes and evaluates a system for underwater wireless communication using visible light. It begins with an introduction to the challenges of underwater communication using acoustic waves or electromagnetic waves. It then describes an existing acoustic-based system and its limitations. The proposed system is presented, using visible light modulated by LEDs to transmit data underwater through optical signals. The system includes a transmitter that modulates the light and a receiver with a photodiode. Testing showed successful underwater transmission over short distances. Benefits of this approach include high bandwidth, data rates, and low latency compared to acoustic systems, while drawbacks include signal absorption, scattering, and the need for precise line-of-sight alignment between transceivers.