Effective underwater communication is crucial for a range of important uses, such as marine biology research, oceanographic studies, and naval operations. Conventional acoustic communication systems encounter difficulties such as the weakening of signals, interference from noise, and a restricted range of frequencies. Recent developments in bionic acoustics provide intriguing solutions by imitating the efficient and adaptable communication strategies of biological creatures. This lecture examines the most recent developments in underwater communications utilizing bionic acoustics. It specifically focuses on the incorporation of bio-inspired signal processing techniques, adaptive modulation schemes, and new hardware designs. Researchers are studying the distinctive acoustic skills of marine species, such as dolphins and whales, to create communication systems that are more durable and effective. These technological improvements are positioned to greatly improve the transmission of data underwater, creating new opportunities for exploring and monitoring the aquatic environment. The text also examines the possible uses and future directions of this developing discipline, emphasizing its revolutionary influence on underwater technology.