GEOLOGY

Detailed explanation-1: -A fast swimming isopod, Excirolana (a mid-beach isopod) scaveges for food above and below the saturated sand zone. Sand crabs and clams are found burrowed below the saturated sand.

Detailed explanation-2: -Soft shell clams live in the intertidal zone, the wet area exposed between high and low tide. Clams are under the water during high tide and are uncovered on the tide flats during low tide. To protect themselves clams burrow down in the mud and sand using their foot.

Detailed explanation-3: -Which best describes the shallow water ocean zone? The long water column protects small organisms from being eaten by large predators. Cooler water temperatures cause a decrease in dissolved oxygen needed by organisms. Sunlight penetration increases algae growth and provides food for a variety of organisms.

Detailed explanation-4: -Below the dysphotic zone lies the aphotic zone, which does not receive any sunlight.

Detailed explanation-5: -Answer. Hydrothermal vents support unique ecosystems and their communities of organisms in the deep ocean.