These are the best Canon cameras for underwater photography, offering high-resolution sensors, excellent low-light performance, and durable build quality to capture stunning marine life, vibrant coral reefs, and deep-sea adventures with remarkable clarity. Whether you're a professional underwater photographer, a scuba diver, or a snorkeling enthusiast, the right camera must provide sharp image quality, strong dynamic range, and reliable autofocus to ensure crisp, well-exposed images in challenging underwater lighting conditions. Canon’s lineup includes full-frame, APS-C, and compact cameras that excel in low-light shooting, fast subject tracking, and compatibility with underwater housings, making them ideal for underwater wildlife photography, freediving, and ocean conservation work. One of the best options is the Canon EOS R5, a 45MP full-frame mirrorless camera featuring incredible resolution, Dual Pixel CMOS AF II, IBIS, and 8K video, making it the ultimate choice for professional underwater photographers who need extreme detail and superior low-light capabilities. For those looking for a more budget-friendly full-frame option, the Canon EOS R6 Mark II offers a 24.2MP sensor, IBIS, 4K 60p oversampled video, and superb autofocus, making it perfect for capturing fast-moving marine life with clarity and precision. If you prefer a DSLR with proven reliability for underwater photography, the Canon EOS 5D Mark IV remains a top choice, featuring a 30.4MP sensor, excellent color accuracy, and strong low-light performance, making it a trusted workhorse for professional underwater imagery. Another excellent DSLR option is the Canon EOS 6D Mark II, featuring a 26.2MP full-frame sensor, Dual Pixel AF, and strong dynamic range, making it a great choice for divers and photographers needing a reliable underwater setup. For APS-C users, the Canon EOS R7 is an excellent mirrorless option, featuring a 32.5MP sensor, IBIS, and advanced autofocus tracking, making it ideal for capturing high-detail underwater images with accurate subject focus. If you're looking for a compact, waterproof camera that doesn’t require an additional housing, the Canon PowerShot D30 offers a rugged, waterproof design up to 82 feet, Full HD video recording, and built-in GPS, making it a great option for casual snorkelers and adventure travelers. When choosing a Canon camera for underwater photography, you can expect high-ISO performance for low-light shooting, fast autofocus for capturing marine life, strong dynamic range for vibrant underwater colors, durable weather-sealed bodies for compatibility with waterproof housings, and compatibility with wide-angle and macro lenses like the Canon RF 15-35mm f/2.8L or RF 100mm f/2.8L Macro IS USM for capturing both expansive ocean scenes and intricate underwater details. While full-frame cameras provide the best image quality and low-light capabilities for deep-sea photography, APS-C models and compact waterproof options offer a lightweight and budget-friendly alternative for casual divers and travel photographers. If you're looking for the best Canon camera for underwater photography, explore these top models and find the perfect fit for your ocean exploration and marine photography needs.