<p>One possible use for Light Fidelity (Li-Fi) technology is enabling green underwater communication with Remotely Operated Vehicles (ROVs). This paper presents the design and implementation of a Li-Fi-based underwater communication system aimed at enhancing the performance and safety of ROVs. Li-Fi technology, which utilizes light to transmit data, offers a cost-effective and environmentally friendly alternative to traditional acoustic communication systems, which often have negative impacts on marine life and are costly to operate. The proposed system employs a unidirectional Li-Fi communication link by integrating Li-Fi-compatible devices at either end of a transceiver. A high-intensity light source encodes data transmitted by the sender, while the receiver decodes it back to its original form, ensuring efficient data transfer. The key to reducing power attenuation and maintaining communication stability is ensuring a clear Line of Sight (LoS) between the transmitter and receiver during transmission. Unlike acoustic systems, which suffer from long-range limitations and biological disruption, the Li-Fi system provides a cleaner, greener solution for ROV communication. Furthermore, this system overcomes the tethering limitations typically encountered in ROV operations, allowing real-time control and video transmission without the risk of entanglement or severance of cables. The development of a Li-Fi-based communication system for ROVs not only enhances the flexibility and efficiency of underwater exploration but also contributes to sustainable and safer marine operations.</p>