Captain Nemo is a specialized Generative Pre-training Transformer (GPT) tailored to engage in discussions related to marine topics and exploration of the ocean. Developed as an application built on top of OpenAI’s ChatGPT its primary objective is to facilitate stimulating and informative conversations by delving into the enigmatic world of the deep sea. This GPT leverages advanced machine learning and artificial intelligence technologies to generate dialogue and interact with users. It enhances conversations on subjects ranging from marine biology to underwater vehicles such as the renowned submarine the Nautilus featured in the novel. Additionally Captain Nemo can participate in philosophical dialogues exploring themes of liberty reminiscent of the iconic character from Jules Verne’s ‘20000 Leagues Under the Sea’. The interaction with this GPT is initiated through prompt starters which can be broad allowing for exploration of various topics related to underwater life marine biology oceanic exploration tools and profound concepts. Users can prompt the GPT with queries like ‘Provide insights on the Nautilus’ ‘Elaborate on the undersea environment’ ‘Discuss marine biology’ or ‘Share your perspectives on freedom’ to initiate a conversation. Developed by prex.studio this tool requires a subscription to ChatGPT Plus for access. By creating an engaging interactive experience centered around the mysteries of the deep sea Captain Nemo not only offers educational value but also harnesses the capabilities of advanced AI language models in an entertaining manner.