Which one of the following statements about corals is NOT CORRECT?
1
Corals possess special stinging cells called nematocytes in their tentacles for capturing prey.
2
Several corals have mutualistic interactions with microorganisms called zooxanthellae that photosynthesize and pass some of the food to their hosts.
3
Reefs form when corals grow in shallow water close to the shores.
4
All corals grow only in the photic zones as they need sunlight for their growth.