Health Issues


Many animals are found in the oceans of the world. Some of the marine animals are the hundreds of species of fish, snakelike eels, crabs, lobsters, shrimp, sea anemones, dolphins and manatees. Other sea animals are sea urchins that are spiney and feed on seaweed, whales such as the beluga, white, killer, and the humpback also live here. Whales sing songs as their communication link between each other. Sharks are also found in oceans of the world. Sharks have five gill slits on each side of the head. Despite what most people think, very few sharks will actually attack humans.

Adaptations that marine animals have are sleek bodies to help them glide smoothly through the water, many colors to help them hide from predators, gills that allow them to breath under the water, sharp teeth which help them to eat their prey and fins to help them maneuver.

This white sided dolphin can easily do flips and turns because of its slender and flexible build.

This bright colored red sea anemone uses its prickly spines to catch its meal. Despite its attractive colors, this anemone has poisonous features.


Plants found in the ocean are seaweed, sea cabbage, kelp, algae, and plankton which are microscopic plants found floating in the ocean. Plankton provide more oxygen than most of the earth's rain forests. Seaweed can be found at depths of 100-200 meters and the giant seaweed can be as long as a football field. Some species of seaweed have air bladders to make them float. They come in colors that range from green, blue-green, red or blue. Algae helps fight against global warming by taking out some carbon dioxide from the atmosphere during photosynthesis. The plants provide food for the animals as well as providing shelter and protection for the animals hiding from their predators.

The seaweed pictured here grows along the northwest coast of North America near tide pools.


Climate is not really a factor of the ocean, however, the location of the water is. The water near the poles is very cold and often frozen over which forms glaciers, while the water near the equator is warm and tropical. The more shallow water is a lighter blue, compared to the deeper water which is a deep dark blue.


Health issues concerned with the marine biome are oil spills which are very dangerous and most often, even deadly to the animals living in this biome. Even birds who come down to land in the water, get stuck in the harmful waste. Other problems are litter which makes its way through rivers and streams and into the ocean. Common garbage that people don't properly dispose of can pollute our oceans.

This duck was caught in an oil spill in Prince William Sound, Alaska, on March 24, 1989. A ship leaked crude oil and hundreds of miles of shoreline were covered in oil. Hundreds of otters and birds were killed along with other sea animals.

Biome Index

Designed by Jeri McWilliams, Alicia Omlid, and Dan Hill