Giant clams live between the corals

Snorkel mask fitting guide. This step is easy. If you have found a mask that fits you perfectly, buy it! The price does not matter if it fits well. (OK. If the price does matter, you can note the exact model, size, and manufacturer and check online to see how much you might save). Also take a careful look at what the mask looks like because the same mask is often sold branded with different names by different companies.