9,564 Like 163 Dislike
You might suppose this catfish is sick, or just confused. But swimming belly-up actually helps it camouflage and breathe better than its right-side-up cousins. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. Normally, an upside-down fish in your tank is bad news. As in, it’s time for a new goldfish. That’s because most fish have an internal air sac called a “swim bladder” that allows them to control their buoyancy and orientation. They fill the bladder with air when they want to rise, and deflate it when they want to sink. Fish without swim bladders, like sharks, have to swim constantly to keep from dropping to the bottom. If an aquarium fish is listing to one side or flops over on its back, it often means it has swim bladder disease, a potentially life-threatening condition usually brought on parasites, overfeeding, or high nitrate levels in the water. But for a few remarkable fish, being upside-down means everything is great. In fact, seven species of catfish native to Central Africa live most of their lives upended. These topsy-turvy swimmers are anatomically identical to their right-side up cousins, despite having such an unusual orientation. People’s fascination with the odd alignment of these fish goes back centuries. Studies of these quizzical fish have found a number of reasons why swimming upside down makes a lot of sense. In an upside-down position, fish produce a lot less wave drag. That means upside-down catfish do a better job feeding on insect larvae at the waterline than their right-side up counterparts, who have to return to deeper water to rest. There’s something else at the surface that’s even more important to a fish’s survival than food: oxygen. The gas essential to life readily dissolves from the air into the water, where it becomes concentrated in a thin layer at the waterline — right where the upside-down catfish’s mouth and gills are perfectly positioned to get it. Scientists estimate that upside-down catfishes have been working out their survival strategy for as long at 35 million years. Besides their breathing and feeding behavior, the blotched upside-down catfish from the Congo Basin has also evolved a dark patch on its underside to make it harder to see against dark water. That coloration is remarkable because it’s the opposite of most sea creatures, which tend to be darker on top and lighter on the bottom, a common adaptation called “countershading” that offsets the effects of sunlight. The blotched upside-down catfish’s “reverse” countershading has earned it the scientific name negriventris, which means black-bellied. --- How many kinds of fish swim upside down? A total of seven species in Africa swim that way. Upside-down swimming may have evolved independent in a few of the species – and at least one more time in a catfish from Asia. --- How do fish stay upright? They have an air-filled swim bladder on the inside that that they can fill or deflate to maintain balance or to move up or down in the water column. --- What are the benefits of swimming upside down? Upside down, a fish swims more efficiently at the waterline, where there’s more oxygen and better access to some prey. ---+ Read the entire article on KQED Science: https://www.kqed.org/science/1922038/the-mystery-of-the-upside-down-catfish ---+ For more information: The California Academy of Sciences has upside-down catfish in its aquarium collection: https://www.calacademy.org/exhibits/steinhart-aquarium ---+ More Great Deep Look episodes: Take Two Leeches and Call Me in the Morning https://youtu.be/O-0SFWPLaII This Is Why Water Striders Make Terrible Lifeguards https://youtu.be/E2unnSK7WTE ---+ See some great videos and documentaries from the PBS Digital Studios! PBS Eons: What a Dinosaur Looks Like Under a Microscope https://www.youtube.com/watch?v=4rvgiDXc12k Origin of Everything: The Origin of Race in the USA https://www.youtube.com/watch?v=CVxAlmAPHec ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios. Deep Look is a project of KQED Science, which is supported by the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation Fund and the members of KQED. #deeplook
Giant Eel Attacks All Animals Undersea - Most Terrible Monster of Ocean ▮Link Video: https://youtu.be/mznddZtgg-U ▮Link website : http://wildlifevideo.net Thanks for watching and supporting our channel, wait to see more new videos on Wednesday on Wild Animals Attack!! Content description:The giant eel from the Amazon isn't actually an eel. It is actually a type of fish called a knife fish. They are some of the strangest enigma's of the water. Come explore! ثعبان البحر العملاق يهاجم جميع الحيوانات تحت البحر - الأكثر رهيبة الوحش المحيط ثعبان البحر العملاق من الأمازون ليست في الواقع ثعبان البحر. هو في الواقع نوع من السمك يسمى أسماك سكين. فهي بعض أغرب لغز من الماء. تعال استكشاف! Source sound: "Floating Cities", "Mystic Force" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/b... ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ►About My Channel - Wild Animals Attack ▮Subscribe: https://goo.gl/wekOSi?sub_confirmation=1 ▮Playlist: ღ Animals Attack Compilation ღ https://goo.gl/rrwd2a ↭ Wild Animals Compilation HD ↭ https://goo.gl/jf50DI ⊰Big Cats Documentary⊱ https://goo.gl/bvR7BB ❣ Snake's Story ❣ https://goo.gl/SeH3tW ღ Animals Mating and Giving Birth ღ https://goo.gl/My5NB1 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ► About us: ▮ Website : http://wildlifevideo.net ▮ Google Plus : https://goo.gl/UvUgJb ▮ Facebook: https://goo.gl/0500Rb ▮ Pinterest: https://goo.gl/H84w6D ▮ Twitter: https://goo.gl/aV9GtA ▮ Email : Info@FunnyA2Z.com ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ►►►►►►►►► THANKS FOR WATCHING ◄◄◄◄◄◄◄◄◄ ► AND DON'T FORGET TO LIKE COMMENTS AND SUBSCRIBE!
Coconut octopuses are among the most intelligent invertebrates around: They use tools, carry their shelters around for when they need them, and, fittingly, adopt an underwater walking motion that's very similar to humans. From: CRAZY MONSTER: Gulpers http://bit.ly/2jdlwQt
Плотоядные растения по праву можно считать чудом природы. Эти удивительные растения — настоящие хищники, они ловят насекомых и членистоногих, выделяют пищеварительный сок, растворяют жертву и в ходе этого процесса получают большую часть питательных веществ. Предлагаем Вашему вниманию Самые известные хищные растения, которые используют разные виды ловушек для того, чтобы заманить свою жертву. Хотели бы вы иметь такое чудо на подоконнике? РЕКОМЕНДУЕМ ПОСМОТРЕТЬ: ЧУДОВИЩЕ, Которое Превращается В КРАСАВИЦУ! ►https://youtu.be/ksvmcIB2yKU РЫБЫ, Которым НАДОЕЛО ЖИТЬ В ВОДЕ! ►https://youtu.be/E-3Ll9P341A 5 Мистических Загадок, Подвластных Только 5 % Умников ►https://youtu.be/DMZZq7QD1fA =========================== Группа ВК: https://vk.com/pandorachannel Подписаться на канал: https://goo.gl/Qg43B8 =========================== Данное видео носит развлекательно - познавательный характер. Музыка/Music used: 1) Per Kiilstofte - The Land Of The Wizard; 2) The Complex Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/
Support Deep Look on Patreon!! https://www.patreon.com/deeplook The South American palm weevil is bursting onto the scene in California. Its arrival could put one of the state’s most cherished botanical icons at risk of oblivion. DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Summer means vacation time, and nothing says, “Welcome to paradise!” quite like a palm tree. Though it’s home to only one native species, California has nonetheless adopted the palm as a quintessential icon. But a new snake in California’s palm tree-lined garden may soon put all that to the test. Dozens of palms in San Diego’s Sweetwater Summit Regional Park, about 10 miles from the Mexican border, are looking more like sad, upside-down umbrellas than the usual bursts of botanical joy. The offender is the South American palm weevil, a recent arrival to the U.S. that’s long been widespread in the tropics. Large, black, shiny, and possessed of an impressive proboscis (nose), the weevil prefers the king of palms, the Canary Island date palm, also known as the “pineapple palm” for the distinctive way it’s typically pruned. A palm tree is basically a gigantic cake-pop, an enormous ball of veggie goodness on a stick. The adult female palm weevil uses her long snout to drill tunnels into that goodness—known to science as the “apical meristem” and to your grocer as the “heart” of the palm—where she lays her eggs. When her larvae hatch, their food is all around them. And they start to eat. If the South American palm weevil consolidates its foothold in California, then the worst might still be to come. While these weevils generally stick to the Canary Island palms, they can harbor a parasitic worm that causes red-ring disease—a fatal infection that can strike almost any palm, including the state’s precious native, the California fan. --- Where do South American Palm Weevils come from? Originally, Brazil and Argentina. They’ve become common wherever there are Canary Island Palm trees, however, which includes Europe, the Mediterranean, the Middle East. --- How do they kill palm trees? Their larvae eat the apical meristem, which is the sweet part of the plant sometimes harvested and sold commercially as the “heart of palm.” --- How do you get rid of them? If the palm weevils infest a tree, it’s very hard to save it, since they live on the inside, where they escape both detection and pesticides. Neighboring palm trees can be sprayed for protection. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/06/20/a-real-alien-invasion-is-coming-to-a-palm-tree-near-you ---+ For more information: Visit the UC Riverside Center for invasive Species Research: http://cisr.ucr.edu/invasive_species.html ---+ More Great Deep Look episodes: Decorator Crabs Make High Fashion at Low Tide https://www.youtube.com/watch?v=OwQcv7TyX04 Everything You Never Wanted to Know About Snail Sex https://www.youtube.com/watch?v=UOcLaI44TXA ---+ See some great videos and documentaries from the PBS Digital Studios! Gross Science: Meet The Frog That Barfs Up Its Babies https://www.youtube.com/watch?v=9xfX_NTrFRM Brain Craft: Mutant Menu: If you could, would you design your DNA? And should you be able to? https://www.youtube.com/watch?v=NrDM6Ic2xMM ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED. #deeplook #palmweevil
Join Deep Look on Patreon NOW!
Cone Snails have an arsenal of tools and weapons under their pretty shells. These reef-dwelling hunters nab their prey in microseconds, then slowly eat them alive.
SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt
DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Explore big scientific mysteries by going incredibly small.
New research shows that cone snails — ocean-dwelling mollusks known for their brightly colored shells — attack their prey faster than almost any member of the animal kingdom.
There are hundreds of species of these normally slow-moving hunters found in oceans across the world. They take down fish, worms and other snails using a hollow, harpoon-like tooth that acts like a spear and a hypodermic needle. When they impale their prey, cone snails inject a chemical cocktail that subdues their meal and gives them time to dine at their leisure.
Cone snails launch their harpoons so quickly that scientists were previously unable to capture the movement on camera, making it impossible to calculate just how speedy these snails are. Now, using super-high-speed video, researchers have filmed the full flight of the harpoon for the first time.
From start to finish, the harpoon’s flight takes less than 200 micro-seconds. That’s one five-thousandth of a second. It launches with an acceleration equivalent to a bullet fired from a pistol.
So how do these sedentary snails pull off such a high-octane feat? Hydrostatic pressure — the pressure from fluid — builds within the half of the snail’s proboscis closest to its body, locked behind a tight o-ring of muscle. When it comes time to strike, the muscle relaxes, and the venom-laced fluid punches into the harpoon’s bulbous base. This pressure launches the harpoon out into the snail’s unsuspecting prey.
As fast as the harpoon launches, it comes to an even more abrupt stop. The base of the harpoon gets caught at the end of the proboscis so the snail can reel in its meal.
The high-speed action doesn’t stop with the harpoon. Cone snail venom acts fast, subduing fish in as little as a few seconds. The venom is filled with unique molecules, broadly referred to as conotoxins.
The composition of cone snail venom varies from species to species, and even between individuals of the same species, creating a library of potential new drugs that researchers are eager to mine. In combination, these chemicals work together to rapidly paralyze a cone snail’s prey. Individually, some molecules from cone snail venom can provide non-opioid pain relief, and could potentially treat Parkinson’s disease or cancer.
--- Where do cone snails live?
There are 500 species of cone snails living in the Indian and Pacific Oceans, the Caribbean and Red Seas, and the Florida coast.
--- Can cone snails kill humans?
Most of them do not. Only eight of those 500 species, including the geography cone, have been known to kill humans.
--- Why are scientists interested in cone snails?
Cone snail venom is derived from thousands of small molecules call peptides that the snail makes under its shell. These peptides produce different effects on cells, which scientists hope to manipulate in the treatment of various diseases.
---+ Read the entire article on KQED Science:
---+ For more information:
Here’s what WebMD says about treating a cone snail sting:
---+ More Great Deep Look episodes:
This Mushroom Starts Killing You Before You Even Realize It
Take Two Leeches and Call Me in the Morning
---+ See some great videos and documentaries from the PBS Digital Studios!
Space Time: Quantum Mechanics Playlist
Above The Noise: Endangered Species: Worth Saving from Extinction?
---+ Follow KQED Science:
KQED Science: http://www.kqed.org/science
---+ About KQED
KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media.
Funding for Deep Look is provided in part by PBS Digital Studios. Deep Look is a project of KQED Science, which is supported by the Templeton Religion Trust and the Templeton World Charity Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation Fund and the members of KQED.