cnidocyte

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The Lybia crab is a species of small crab in the family Xanthidae. It is also referred to as Hawaiian boxer crab, pom-pom crab, cheerleader crab, mosaic boxer crab among many other nicknames. The crabs are known for their signature move of always carrying a small living sea anemone around in each of its claws. 

By waving sea anemone into different routines its dances its way to a free meal, gathering debris and food particles from the ground around the crab’s hiding place. 

If provoked or attacked by a predator, the pom-pom crab (boxing crab) will threaten the aggressor and try to deter it by waving it’s anemones around, the tentacles of which are well armed with cnidocytes (stinging cells). Video

7 Underwater Facts for World Oceans Day

Today is World Oceans Day, a global day of ocean celebration and collaboration for a better future. A healthy world ocean is critical to our survival. Together, let’s honor, help protect, and conserve the world’s oceans!

1. While the Earth’s oceans are known as five separate entities, there is really only one ocean.

2. The ocean contains upwards of 99% of the world’s biosphere, that is, the spaces and places where life exists.

Both above GIFs are from the TED-Ed Lesson How big is the ocean? - Scott Gass

Animation by 20 steps

3. Jellyfish are soft because they are 95% water and are mostly made of a translucent gel-like substance called mesoglea. With such delicate bodies, jellyfish rely on thousands of venom-containing stinging cells called cnidocytes for protection and prey capture.

From the TED-Ed Lesson How does a jellyfish sting? - Neosha S Kashef

Animation by Cinematic

4. Plastics & litter that make their way into our oceans are swiftly carried by currents, ultimately winding up in huge circulating ocean systems called gyres. The earth has five gyres that act as gathering points, but the largest of all is known as the ‘Great Pacific Garbage Patch’ and has grown so immense that the oceanic garbage patch can shift from around the size of Texas, to something the size of the United States. 

From the TED-Ed Lesson The nurdles’ quest for ocean domination - Kim Preshoff

Animation by Reflective Films

5. The 200 or so species of octopuses are mollusks belonging to the order Cephalopoda, Greek for ‘head-feet’. Those heads contain impressively large brains, with a brain to body ratio similar to that of other intelligent animals, and a complex nervous system with about as many neurons as that of a dog.

From the TED-Ed Lesson Why the octopus brain is so extraordinary - Cláudio L. Guerra

Animation by Cinematic

6. Some lucky animals are naturally endowed with bioluminescence, or the ability to create light. The firefly, the anglerfish, and a few more surprising creatures use this ability in many ways, including survival, hunting, and mating.

From the TED-Ed Lesson The brilliance of bioluminescence - Leslie Kenna

Animation by Cinematic

7. Sea turtles ultimately grow from the size of a dinner plate to that of a dinner table. In the case of the leatherback sea turtle, this can take up to a decade. Happy World Turtle Day!

From the TED-Ed Lesson The survival of the sea turtle - Scott Gass

Animation by Cinematic Sweden

Méduse by StudioPhotos78 Le terme méduse est un nom vernaculaire désignant les formes libres de nombreux groupes de cnidaires et qui s'opposent donc aux formes polypes, sessiles. Les méduses sont généralement des prédatrices, elles paralysent leurs proies grâce à leurs cnidocytes et peuvent posséder des structures sensorielles très élaborées comme des ocelles, rassemblées au sein de rhopalies. Certaines méduses appartenant à la classe des Cubozoa peuvent être mortelles pour l'Homme. Dans le cycle de vie de certains groupes de cnidaires, la forme méduse peut alterner avec la phase polype, mais d'autres vivent uniquement à l'état de méduse. Bien qu'on les retrouve principalement dans les eaux salées, il est possible d'observer certains types de méduses en eau douce.

Il existe environ 1 500 espèces de méduses répertoriées au début du XXIe siècle, essentiellement des hydroméduses. Les méduses sont par ailleurs considérées - au vu des résultats récents de phylogénie moléculaire - comme un caractère propre à l'un des deux groupes de cnidaires, appelé en conséquence Medusozoa (composé des classes : Cubozoa, Scyphozoa et Hydrozoa). L'autre groupe étant celui des Anthozoa. Cependant l'origine évolutive exacte de la forme méduse est encore mal comprise.

E is for Envenomation (5/26)

Fandom: Star Trek (AOS/TOS)
Pairing: 
 ReaderXBones
Prompt: Fic 5 of 26 in the CMO’s Log – A to Z series.  Click here for a listing of all the fics in this series!  E is for Envenomation.
Word Count: 
1235
Warnings:
minor injury, grumpy!Bones.
Rating: All ages.
Author’s Note: I had to throw a little bit of something close to home in there, now that I’ve changed career tracks and am specializing in marine biology! :D

E is for Envenomation

After close to six months straight in space, you’re finally on shore leave at home on Earth, and while you couldn’t be happier, your boyfriend is even more so.  You can’t help but laugh as he soaks up the sun on the beach, breathing honest-to-goodness Terran air and listening to the waves crashing on the beach.  You’ve rarely seen him in a better mood, and you don’t think you’ve ever seen him quite so relaxed.

As the heat gets to be a little much for you, you reach over, splaying your hand on his chest and rolling off of your towel, into the sand to be closer to him.  He turns his head, opening his eyes to meet your gaze.

“Let’s go for a swim,” you urge, the tang of the salt in the air beckoning you.

Keep reading

anonymous asked:

I don't recall if you've already answered any of these, but could I get a corrupted form for a Desert Rose and Medusa Quartz? Also for Medusa Quartz, weapon ideas and abilities? Forgive me if you've answered any of these already. ^^;

I have not answered them before! You’re good :)

Medusa Quartz:

Weapon:
Harpoon (see ‘Ability’)
“Jellyfish have special cells along their tentacles called cnidocytes. Within these cells are harpoon-like structures full of venom, called nematocysts.”
Read more: http://www.smithsonianmag.com/science-nature/whats-behind-that-jellyfish-sting-2844876/#Tv4FgBCr7z5Zy2KQ.99

Quartz in general:
http://gemsonaresources.tumblr.com/post/147365513765/hey-im-working-on-a-team-of-homeworld-gems-and#notes

Ability:
Can sting their enemy like jellyfish can
“Under magnification, some resemble the shape of a floating jellyfish named medusas rondeau. Thus the name Medusa quartz.”
http://www.ebay.com/gds/Medusa-paraiba-quartz-and-other-included-gemstones-/10000000001866075/g.html

Corrupt Form:
Either like the Jaspers we’ve seen in the show since they are Quartzs or a jellyfish inspired form (see ‘Ability’)!


Desert Rose:

Corrupt Form:
The gem’s corrupt form would be made up of flower/rose petal shaped stones. The corrupt form may also have particles of sand fall from its body. The corrupt form can control the wind around it. The corrupt gem will prefer to live in desert/arid terrain where it is hot.
“A variety of gypsum with a hardness of 1.5 – 2, these mineral roses are formed by the forces of wind, water and pressure in dry, arid regions due to the evaporation of a shallow salt basin. When sand particles become embedded in these basins, the loose sand is trapped in the minerals during the evaporation process and forms rosette-like concretions with unique flower-like crystal structures. Desert roses are found in the Sahara desert, the Southwest of the USA, Australia, Mexico and Spain.”
https://www.feelcrystals.com.au/product-category/crystal-meanings/desert-rose-crystal/

Selenite in general:
http://gemsonaresources.tumblr.com/post/159811776875/what-would-a-corrupted-serendibite-selenite-and#notes

“Desert Rose is a variety of Selenite.”
http://meanings.crystalsandjewelry.com/desert-rose/

youtube

How do jellyfish sting? 

Jellyfish have cells called cnidocytes which when triggered by fluctuations in ion concentration, release barbs that contain venom causing the painful stinging sensation. These cells are commonly found amonst the phylum Cnidaria and are commonly found in combination with a number of other sensory cells which only allow for their stimulation under the right circumstances.