Natural means as found in nature and not involving anything made or done by people.

Marine organisms are the plants, animals and other organisms that live in the sea or ocean.

Snorkeling is the activity of swimming while using a snorkel.

Scuba diving is the sport of swimming underwater with special breathing equipment.

Coral is a substance like rock, formed in the sea by groups of particular types of small animal.

Creature is any large or small living thing that can move independently.

Plankton is very small plants and animals that float on the surface of the sea and on which other sea animals feed.

Disappear means to no longer exist.