OCEAN

Discover 10 fun facts about the Sea Stars! 1. They have no brain and no blood. Starfish use filtered sea water to pump nutrients through their nervous system. 2. They can live up to 35 years. 3. Starfish is not their right name, they should always be called Sea Star! They’re actually related to sand dollars and sea urchins. They do not have gills, scales, or fins like fish do. So because they are not classified as fish, scientists prefer to call starfish “sea stars.” 4. There are around 2,000 species of sea star. While many species live in tropical areas, you can also find sea stars in the cold waters of the Earth, even the polar regions. 5. They cannot survive in fresh water. 6. They can regenerate. But its takes a while. It can take u to a year for a lost limb to grow back. 7. They eat inside out. When they capture prey, they have tiny suction cups to grab ahold of their food. Then their stomach exits their mouth to digest the food, and reenters the body when they’re done eating. Lea...

Skip to main content Latest news Fascinating facts about jellyfish 2 minute read Jellyfish have been drifting, floating and bobbing along in our ocean for over 500 million years - that's longer than dinosaurs, and a lot longer than us. Jellyfish are 95% water Surprisingly, jellyfish are mostly made up of water, not jelly. This is why they look so different in the water than out of it. They don’t have brains, hearts, or lungs Jellyfish are very simple organisms. Their bodies are made up of just three layers— the outer epidermis, a gelatinous middle layer called the mesoglea, and the inner gastrodermis. Credit: Cathy lewis Jellyfish are a type of ‘cnidarian’, which is named after the Greek word for "sea nettle” Cnidarians are jelly-like marine animals which have radical symmetry and sting their prey using cells on their tentacles called ‘cnidocytes’, which explode when stimulated! Jellyfish have hydrostatic skeletons Rather than a skeleton made up of bones, jellyfish have bells ...

 ocean provides crucial environmental services to humankind, such as climate regulation. It also provides a means of trade and transport as well as access to food and other resources. It is known to be the habitat of over 230,000 species, but may hold considerably more – perhaps over two million species.[19] However, the ocean faces numerous human-caused environmental threats, such as marine pollution, overfishing, and effects of climate change on oceans such as ocean warming, ocean acidification and sea level rise. The continental shelf and coastal waters that are most a Menu DONATE ARTICLE All About the Ocean The ocean covers 70 percent of Earth's surface. GRADES 9 - 12+ SUBJECTS Biology, Earth Science, Oceanography, Geography, Physical Geography PHOTOGRAPH Cast-Net Fishing A Hawaiian fisherman uses a cast net. A cast net is usually small enough to be operated by one person. It is round or oval, and can be thrown, or cast, over a large area. Weights on the side of the net help it...