Life in the Ocean
The oceans of the world are filled with thousands and thousands of different living things. Scientists believe there may be a million different species living in the oceans, some of which have yet to be discovered. And just like on land, there are many different plants and animals.
Many of the ocean plants either float on the surface of the water, or grow in shallow water. Plants in the ocean need sunlight to grow just like those on land. The deepest parts of the ocean may not contain plant life because the energy from the Sun cannot reach deep into the ocean.
An ocean plant called seaweed is a type of algae called phytoplankton. Phytoplankton are very tiny, but it is the plant that gives off more oxygen than any other plant on Earth. Seaweed is a type of algae that floats on the surface of the water and has been used by people for food, and material for housing, ropes, and baskets.
Kelp is an ocean plant that can reach sizes up to 250 feet. It the largest ocean plant in the world and is usually brown. Kelp grows and lives on the surface of the water, but some kelp can also be very colorful. Kelp is another kind of seaweed. It grows very quickly and also needs the energy from the Sun to survive.
A final type of plant is called seagrass. Seagrass also grows in shallow water living on the floor of the ocean. In addition, they have roots and flowers. There are many other plants in the ocean that are similar to algae and seaweed.
The ocean is the largest habitat for animals in the world. There is animal life throughout the ocean. The oceans are so large, there may be animals that have yet to be discovered. The animals of the ocean live in the deep open sea, or they live on the land and in the water.
Coral is an animal of the ocean, even though many people believe it is a plant. Coral relies on algae in the ocean to keep it alive. The coral also helps the algae to survive. The algae attached to the coral gives coral its beautiful colors. Coral has tentacles to capture small fish.
Finally, there are many different types of fish living in the world's oceans. Some of the fish include: tuna, sharks, eels, stingrays, angelfish, clownfish, salmon, sardines, cod, and many others.
In addition to fish species, there are mammals that live in the ocean including: dolphins, whales, seals, sea lions, sea otters, manatee and several others.
Many other animals living in the ocean include the octopus, lobster, crabs, jelly fish, squid, clams, sea dollars, and many more. Some animals live on land and in the ocean, relying on the ocean for their food. These animals include sea turtles, saltwater crocodile, marine iguana, and several others, including the polar bear. Furthermore, there are many seabirds that rely on the ocean for survival including penguins, pelicans, tern, albatross, puffins, gulls, and a few others.
In summary, the ocean is filled with a variety of plant and animal life, from tiny plankton to the largest mammal in the world, the whale. Some people think coral is a plant, but it is actually an animal which relies on the algae to keep it alive. The ocean is a giant habitat where many of the living organisms rely on each other to stay alive.