Coral is a colorless marine animal that lives on the ocean floor and can be red, orange and other colors. Any color that appears to be present on coral is a buildup of algae that live on the coral. Like other animals of the sea, coral can change color with emotion.Know More
An individual coral is known as a polyp. Polyps attach themselves to rock along the ocean floor and multiply to form a colony. Each polyp has a hard, protective skeleton at the base that creates a reef when colonies are formed.
Coral are very sensitive to environmental changes such as a change in temperature or pollution. A completely white coral, also referred to as "bleached out," indicates that the animal is stressed. Stressed coral will not allow algae to remain on its surface, placing itself and the rest of the reef it may be attached to in danger.Learn more about Marine Life
Rachel Carson was a marine biologist whose 1962 best-selling book "Silent Spring" ushered in a national ban on DDT and other pesticides. While Carson didn't technically discover anything, the book inspired a grassroots movement that led to the formation of the federal Environmental Protection Agency.Full Answer >
Seashells are exoskeletons of marine invertebrates such as mollusks and sea snails, and they grow from the inside out or by depositing new material at the edges, according to Scientific American. Two common types of seashells are bivalves and gastropod shells. The former are made by mollusks such as oysters and clams. The latter are exoskeletons of marine snails.Full Answer >
While they possess a number of adaptations that allow them to survive in their marine habitats, the most important adaptation of sea urchins is their protective coat of spines. Additionally, sea urchins have highly modified mouths, composed of five bony plates, which enable them to scrape algae off rocks and coral. While often solitary, sea urchins sometimes form large aggregations, which help to protect the invertebrates from predators.Full Answer >
Plankton consist of very tiny organisms located in marine and freshwater environments, according to the Encyclopedia of the Earth. The three very broad essential types of plankton are phytoplankton, zooplankton and bacterioplankton. These organisms frequently represent the bottom of the food chain in aquatic environments and are key to maintaining ecological balance.Full Answer >