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Transcript

The Sea Walnut: An Invasive Species.

Here is a short video on Sea walnuts.

Native Location

What Is Being Done?

The Sea Walnuts are native to Western Atlantic. Other areas that are affected by the Sea Walnuts are: the North Sea, the Black Sea, the Ballast Water, Caspian, the Wadden Sea, and Baltic Sea. The areas that are most affected from Sea Walnuts are: the Black Sea, and the North Sea.

To help prevent the dangers of Sea Walnuts from escalating, the government is making stricter rules for when people are entering foreign waters, so the oceans do not get contaminated by the other ships. Also, ships need to be regulated to purify the water and get rid of any animals and nutrients that we do not need, instead of mixing it with other bodies of water.

Sources

Characteristics

www.aquariumofpacific.org

www.ecomare.nl

The Sea Walnuts have MANY characteristics. Here are a few. They look like jellyfish, but they do not sting. The Sea Walnuts are also translucent. They can grow up to be 3.9 - 4.7 inches long. Their width is about half of its length. Another characteristic is they pump water into their body cavity to capture small prey. To capture big prey, the Sea Walnuts out stretch their lobes, then snap them close. Also, a body part called the cilia can show light, rainbow color, and bright stripes when it moves. They can also stand water temperatures from 39.2 to 87.8 degrees fahrenheit! The Sea Walnuts are carnivores as well. The main foods that they eat are zoo-plankton, eggs, cope pods, and sea jellies. They are never not hungry. On their body, the Sea Walnuts have 8 rows of hair that is symmetrical and the hairs slowly move through the water. Also, for feeding, they have two rows of lobes on each side of their mouths, and can be retracted back into the body. Finally, at night, you may be able to see a light green color on their body.

blogs.discovermagazine.com

eol.org

Baby Sea Walnuts Characteristics

wikipedia.org

What Problems Do They Cause? What Effects Do They Have On The Food Web?

*prezi.com-the dangers of sea walnuts

When the Sea Walnuts have babies, the eggs are fully formed in just 20 hours. The eggs are .12 to .16 inches long. The Sea Walnuts can lay eggs after two weeks old. They can survive with no food for 3 weeks, because they make themselves smaller. Finally, the Sea Walnuts make eggs so fast, 1 Sea Walnut can start a new non-native population.

The Sea Walnuts cause other local food webs to collapse and many other ecological effects. For example, the fish population goes down a lot because of the Sea Walnuts. Another problem they cause is they end up in different seas (probably because of the merchant ships' Ballast water), the population got larger, because there were no predators, so more and more animals started becoming extinct, or very close to it. Also, when the Sea Walnuts were found in the Caspian Sea, 75% of the animals ate zoo-plankton (just like the Sea Walnuts), and the entire food chain was affected. Also in the Baltic Sea, there was once 100 species, now there is only 4 at the most.

prezi.com/sea-walnut

Photos of Sea Walnuts

Fun Facts!

What Can We Do?

1. Another word for Sea Walnut is Comb Jelly!

2. The Sea Walnuts eat 10x its weight every single day!

3. 100-120 million tons of marine life was lost in the last two decades because of the Sea Walnuts!

4. Sea Walnuts are harmless to humans, but deadly to animals!

5. Sea Walnuts make eggs so fast, 1 species can start a new non-native population!

Some things that we could do to prevent the problem with Sea Walnuts is to write a letter to state and government officials to try and stop the harm that the Sea Walnuts are causing. Also, if you notice an unusual animal that seems strange or if you have never seen it before in the body of water, you can speak to the people who are responsible of the land so the issue can be addressed.

Thank You!!

Thank you for watching and I hope you learned something new about my invasive species: THE SEA WALNUT!!!!!!

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