The delicate electronics in cameras need to be cared for and moisture can be highly detrimental, especially combined with salt-water. We do need to be extra careful to keep our camera equipment dry, especially moving in and out of the zodiacs. Keeping your camera in a hard, waterproof case like a Pelican Case is ideal, although a dry bag works quite well too - add a small towel to give your camera some cushioning. Otherwise any weather-resistant bag will help - or just keep your camera under your jacket! Remember to always secure zips and latches on camera cases each and every time. The more expensive your equipment is the more you should consider investing in protection for it.