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Seagrass

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A beautiful underwater view of Posidonia oceanica, a type of seagrass found in the Mediterranean Sea.

Seagrass

Seagrasses are special plants that grow in the ocean. They look a bit like grass on land but they are true plants with flowers. There are about 60 different kinds of seagrasses.

These plants have long, narrow leaves that spread out in large underwater areas called meadows. They live in shallow coastal waters where sunlight can reach them. Seagrasses are anchored in sandy or muddy bottoms. Like other plants, seagrasses make their own food using sunlight through a process called photosynthesis.

Seagrass meadows are very important for the ocean. They help store carbon, which helps fight climate change. They also provide homes and food for many sea animals. These meadows are some of the most productive places in the ocean, supporting life in ways similar to coral reefs.

Seagrasses came from land plants that returned to the ocean millions of years ago. They can only live where the water meets the land or in the ocean. Their pollination and seed making all happen underwater. Their leaves are made for capturing sunlight.

Seagrass meadows are important homes for many sea creatures. They give shelter and food to fish, turtles, manatees, and many smaller animals. The plants help keep water clean and clear by trapping dirt and slowing down the water. They also help protect shorelines from big waves and storms. Because seagrasses live underwater, they make a lot of oxygen, which helps all the sea life. These meadows store a lot of carbon, helping to keep our planet healthy.

Each year on March 1, World Seagrass Day is celebrated to remind people how important seagrasses are to our oceans.

Images

Diagram showing how seagrasses evolved from marine plants, diversified on land, and then returned to the sea.
A underwater photo showing Zostera eel grass growing in a coastal channel.
A detailed botanical drawing of Thalassia hemprichii, a type of seagrass found in marine environments.
A photograph of Amphibolis griffithii, a type of seagrass found in the flora of South Australia.
A photograph of shoal-grass, a type of marine plant, growing in shallow water at the St. Lucie County Marine Center in Florida.
A photo showing sea grass (Syringodium isoetifolium) and hard coral (Acropora sp.) – important parts of ocean ecosystems.
A detailed drawing of Thalassodendron ciliatum, a type of marine plant, showing its leaves and structure.
Scientist examining newly released and one-week-old seeds of Posidonia oceanica, a type of seagrass.
A large seagrass called Enhalus acoroides growing along Singapore's shores, known for its impressive length and regular flowering.
A beautiful underwater view of Johnson's seagrass bed, showing important plant life in the Gulf of Mexico.

Related articles

Pollination
Fish

This article is a child-friendly adaptation of the Wikipedia article on Seagrass, available under CC BY-SA 4.0.

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