AP BIOLOGY

Detailed explanation-1: -The deep-sea is defined as the part of the ocean below 200 meters depth. This environment Is considered extremely harsh with temperatures of below 5 degrees Celsius, extreme pressure (2, 000 meters equals about 200 times the atmospheric pressure at sea level), and no sunlight.

Detailed explanation-2: -Coral characteristics Shallow water, reef-building corals have a symbiotic relationship with photosynthetic algae called zooxanthellae, which live in their tissues. The coral provides a protected environment and the compounds zooxanthellae need for photosynthesis.

Detailed explanation-3: -Yet recent advances in deep ocean exploration have revealed spectacular coral gardens in the dark ocean depths. Hundreds-and even thousands-of feet beyond the reach of sunlight, these unique corals and sponges are found off all our coasts.