The Olympus Tough TG-6 is a top choice for oceanic videography enthusiasts looking for a durable and versatile camera under $700. With its waterproof, shockproof, and freeze-proof design, the TG-6 can withstand the harsh underwater environment while delivering high-quality 4K video and 12MP still images. The camera features a fast f/2.0 lens, allowing for better low-light performance and faster shutter speeds to capture fast-moving underwater subjects. The built-in microscope mode enables stunning macro photography, and the camera's underwater white balance modes ensure accurate colors in various underwater conditions. While the Olympus Tough TG-6 offers excellent performance and durability, it may not be the best choice for professional videographers who require more advanced features and controls. However, for hobbyists and enthusiasts, the TG-6 is a fantastic option that combines affordability, performance, and ease of use.

The GoPro HERO9 Black is a top choice for oceanic videography enthusiasts looking for a compact and powerful camera. With its 20MP sensor and 5K video resolution, it delivers stunning image quality and crisp, detailed footage. The camera is waterproof up to 33 feet (10 meters) without a housing, making it perfect for snorkeling and shallow dives. For deeper dives, you can use the GoPro Protective Housing (sold separately) that allows you to take the camera down to 196 feet (60 meters). The HERO9 Black features HyperSmooth 3.0 stabilization, ensuring smooth and stable footage even in challenging underwater conditions. The camera also offers TimeWarp 3.0 for captivating time-lapse videos and LiveBurst mode for capturing 1.5 seconds before and after your shot, giving you more options to choose the perfect frame. The front-facing display makes it easy to frame your shots and monitor your settings. While the GoPro HERO9 Black is an excellent choice for oceanic videography, it may not be the best option for those looking for a dedicated underwater camera with more advanced features. However, its compact size, versatility, and powerful performance make it a popular choice for capturing breathtaking underwater scenes.

The Panasonic Lumix FT7 is a fantastic choice for oceanic videography enthusiasts looking for a feature-rich camera that can withstand the underwater environment. With its waterproof rating of up to 102 feet, shockproof design, and freeze-proof capabilities, this camera is built to handle the toughest conditions. The 20.4-megapixel sensor and 4K video recording capabilities ensure that you capture stunning, high-quality footage of your underwater adventures. The Lumix FT7 also features a built-in electronic viewfinder, making it easier to compose your shots in bright sunlight. The camera's 4.6x optical zoom lens allows you to get closer to your subjects without sacrificing image quality. However, the low-light performance may not be as strong as some other cameras on this list, and the autofocus system can be a bit slow in certain situations. Despite these minor drawbacks, the Panasonic Lumix FT7 is a reliable and versatile option for oceanic videography under $700.

The SeaLife Micro 3.0 is a dedicated underwater camera designed specifically for oceanic videography, making it an excellent choice for capturing stunning underwater footage. With a depth rating of 200 feet, this camera is built to withstand the harsh underwater environment while delivering high-quality 16MP still images and 4K video at 30fps. The Micro 3.0 features a permanently sealed design, eliminating the need for a separate housing and ensuring that it remains waterproof at all times. The camera also offers a wide range of underwater shooting modes, including color correction filters and manual white balance, allowing you to capture vibrant and accurate colors in various underwater conditions. One downside to the SeaLife Micro 3.0 is its limited battery life, which may require you to carry spare batteries for longer dives. However, its dedicated underwater design, ease of use, and impressive performance make it a top choice for oceanic videography enthusiasts looking for a camera under $700.

The Canon PowerShot D30 is an excellent choice for those looking to capture beautiful underwater footage without spending a fortune. This camera is designed specifically for underwater use, with a waterproof rating of up to 82 feet (25 meters) and a shockproof design that can withstand drops from up to 6.5 feet (2 meters). The 12.1-megapixel sensor delivers high-quality images, and the built-in GPS allows you to track your adventures and geotag your photos. The 5x optical zoom lens allows you to get closer to your subjects, while the Intelligent IS system ensures sharp and steady shots. One downside to the Canon PowerShot D30 is that it does not offer 4K video recording, but it does capture Full HD 1080p video at 24fps, which is still impressive for a camera in this price range. Overall, the Canon PowerShot D30 is a reliable and user-friendly option for those looking to document their underwater adventures without breaking the bank.