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Super Pi

on 11 October 2012

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Transcript of jellyfish

Life Cycle Jellyfish hatch from eggs, starting out as a swimming larva that resembles a hairy bean. Even though they are only about .5 mm long, they can still sting! Larval Stage Polyp Stage Next, the larva finds a nice place to rest and attaches itself to it, becoming a polyp similar to a sea anemone. While still attached to their resting spot, the polyp produces several little jellyfish-like creatures called ephyra. Then the ephyra swim off to feed on plankton. Anatomy For being 250 million years old, jellyfish have not really changed. They look more or less the same. In this report, we'll mostly be looking at the anatomy of 'true' jellyfish, or the scyphozoans. Just follow the bullets! >:) Ephyra & Medusa Stage The aforementioned ephyra grows in size, eventually becoming a medusa. Medusas are the full-fledged jellyfish that most of us are familiar with. Jellyfish in the wild typically live for 2 to 6 months. Smaller jellies may live for a few hours, but in the care of humans some can live for several years (provided they are cared for properly). Habitat The Ocean Jellyfishes Most jellyfish live in the ocean. They can be found from the surface of the water to the deep, dark trenches. While they are mostly water and not much else, some animals like the sea turtle find jellyfish an invigorating snack (as do some people like my brother). Jellyfish in the ocean prey on plankton, fish eggs (caviar, anyone? Masago?), and other tiny fishes. ~Welcome~ So this is my presentation about jellyfish. Clearly! Jellyfish are my faaaavorite animals ever, because they are so fascinating. I think that perhaps after this Prezi, you will think so too. Freshwater Jellyfish in freshwater generally are not as big as those in the ocean, nor are they as widespread. One major exception is Jellyfish Lake in Palau. This lake is on an uninhabited island and is chock-full of both golden jellyfish (Mastigias sp.) and moon jellyfish (Aurelia aurita). For a fee, you can go swimming in this lake-the jellyfish's stingers have been nullified by exposure to freshwater. the correct plural form of jellyfish, in fact, remains as 'jellyfish'. Lumpy's back! Jellyfish have no skeletal, respiratory, or nervous system, but that's purrty obvious. The skeletal part, that is.
The nematocysts, or stingers, are found in the tentacles, while the oral arms pass food to the mouth.
The bell is the round top of the jellyfish. Inside it is the stomach! When jellyfish feed, they paralyze their prey before sloooowly dragging it straight to their stomach. Kinds of Jellyfish Moon Jellyfish Moon jellyfish (aurelia aurita) are super common and can be found all over the world, excluding places like Kansas. They are scyphozoans, or 'true jellyfish'. Moon jellyfish eat plankton including
fish eggs and copepods. They are a bit on
the small side, ranging from 25-40 cm in
diameter. so purrty The lion's mane jellyfish is the largest jellyfish in the world. These jellies live far up in the Artic and northern Pacific and Atlantic. The largest ever Lion's mane recorded had a bell diameter of 7 feet and tentacles 120 feet long. However, the jellyfish found further south are a lot tinier. Lion's mane jellyfish eat plankton, small fishies, and moon jellyfish. Where do they come from? How did they get there? Where are they? Some notable gelatinous blobs. Turritopsis nutricula the immortal jellyfish As evidenced by the title, Turritopsis nutricula is theoretically immortal. This jelly is not very big and started out in the Caribbean before spreading throughout the world. Turritopsis nutricula, after becoming a mature jelly, can revert its cells back to polyp stage, basically making it immortal. However, most Turritopsis are killed by outside sources before ever making use of their awesome god-powers and becoming kids again. (hopefully) Lion's Mane I hope you enjoyed this prezi! If not, well, many apologies for wasting ten minutes (or so) of your life. If you have questions, pleeeease raise your hand like a civilized person, because you are purrobably not a savage (OR ARE YOU). Yay for jellyfish! Done! an ephyra (pronounced eh-feeeee-ra) a medusa. these specimens are called sea nettles (-^.^-) more happy sea nettles, bobbing in the ocean without a care in the world. or a brain, for that matter. \'ˈje-lēe-ˌfish\ this is not a tuber neither is this
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