It all depends on the camera you choose to use underwater. Always make sure you check if there is a housing for the camera you’d like to buy first!
For mirrorless cameras and DSLR’s you will probably have to look at more expensive brands like Nauticam, Isotta, Aquatica and Subal for example. These housings will last you a life time, unfortunately your camera won’t…
If you are choosing to use compact cameras, there are high end possibilities like Nauticam, Sea & Sea, Isotta, but also more mid-range options such as Fantasea Line. This company makes great housings for the Sony RX or Canon series. Ikelite, Sony’s own brand housings for the RX series and Olympus Tough for the TG6 are budget friendly options and of good quality.