Foundations are generally considered either shallow or deep. Often, a distinction is made between deep and shallow marine environments. They are found in habitats ranging from shallow intertidal areas to abyssal depths. Nonspongers from deep and shallow channels had similar data. This makes the relative safety of deep versus shallow squats difficult to determine. Barnacles are exclusively marine and tend to live in shallow and tidal waters. Kabuli palaw is cooked in large shallow and thick dishes. It is very dry, except for occasional shallow and temporary water sheets after rains. Salinity occurs on drylands from overirrigation and in areas with shallow saline water tables. These are estuaries with shallow sill constrictions. They were also found under rocks in shallow water. These have evolved to hunt for fish in shallow water. They also will feed on fish or insects that have become stranded in shallow water. They roost and loaf communally on beaches, sandbanks, and in shallow water. However, there are limitations on their use in shallow water.