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#sharks

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Avalik
Lukas VFN 🇪🇺

Biologists witness first case of a #shark intentionally making sounds phys.org/news/2025-03-biologis

Evidence of active sound production by a shark: Carolin Nieder et al. royalsocietypublishing.org/doi

"the clicks are made by the #sharks rubbing their teeth together. Such clicking sounds could serve as a means to momentarily confuse predators, such as fur seals... it is unlikely the sounds are calls for help from others of their kind, as most of the frequencies were higher than the range of shark hearing."

underwater photo of a shark
Avalik
Lukas VFN 🇪🇺

Fossil Research Identifies New 340 million years old #Shark Species at Mammoth Cave National Park home.nps.gov/maca/learn/news/f paper: doi.org/10.1017/jpa.2024.40

"Nick-named Chipmunk #sharks for their small size and chisel-like front teeth and crushing back teeth, members of the Obruchevodidae were between 3-4 inches in length. Their small size allowed them to avoid larger predators as they foraged on crustaceans, worms, and small brachiopods found along the sea floor"

Illustration of various animals in prehistoric ocean
Avalik
Lukas VFN 🇪🇺

Undersea mountains are key hubs for sharks phys.org/news/2025-02-undersea paper: journals.plos.org/plosbiology/

"#Zooplankton were twice as common at shallow #seamounts than in the open ocean, while #shark biomass was 41 times higher... #FilterFeeders may benefit from prey being blown over the peak, and the peak may also stop prey species from retreating into deeper water... Also, some predators appear to use seamounts as hubs to gather, socialize, mate or rest"

underwater photo of sharks swimming around a white cylindrical science instrument
#Sharks#Animals#Ecology
Avalik
Benjamin Carr, Ph.D. 👨🏻‍💻🧬

Watch A #SleeperShark Appear Out Of The Gloom And Chow Down On A #DeepSea Camera
Little is known about these large deep-sea #sharks and it is rare to see a full adult.
#Pacific sleeper #sharks (Somniosus pacificus) are thought to be fairly widespread and live at depths of around 2,000m (1.2 miles). Adult females can reach lengths of around 3.7-4.3m (12.1 -14.1ft) but there is some suggestion that the maximum length for this species could be 7 meters (23 feet) long.
iflscience.com/watch-a-sleeper

Watch A Sleeper Shark Appear Out Of The Gloom And Chow Down On A Deep-Sea Camera
IFLScience · Watch A Sleeper Shark Appear Out Of The Gloom And Chow Down On A Deep-Sea CameraEleanor Higgs poolt
Avalik
Florian Launette
Up, close and personal vol 7.
I took this image of a female Tiger shark last year, in october at 80 miles to Bimini. This image went with my film "Face To Face: Overcoming Fear With Sharks" I love sharks, all the sharks.

How I did this image ? Canon R5 Sigma 20 mm Art f1,4 1/100e F3,5 Iso 1600 Easydive Underwater Housing 2 Big Blue lights 10 000 x 2 Lumens

Sharks are the super-predators of the oceans and the terror of the Western world. They are often perceived as bloodthirsty killers. This fear is heightened every time a shark attack hits the headlines. In response, beaches around the world are closed, nets are set up and sharks are systematically slaughtered. Living with sharks seems incompatible with our new lifestyles.
Yet one country has made a radically different choice: the Bahamas. This paradise archipelago, which welcomes nearly 7 million visitors every year, has declared́ its waters "shark sanctuaries". How do locals and tourists manage to live with these large predators? Would it be possible to get close to those considered to be man-eaters?
To answer this question, photographer Rodolphe Guignard takes us to the heart of shark territory. Accompanied by experts and scientists, he dives right up close to the sharks to capture some surprising interactions. An intense face-to-face encounter that reveals the true face of sharks, the opposite of their sad reputation

#photography #photo #wildlife #wildlifephotography #wildlifeprotection #shark #sharks #tigershark #animal #animals #portrait #natur #nature #natura #bahamas #underwater #underwaterphotography #scuba #scubadiving #scubadiver #canon #canonphoto #canonphotographers #canonphotography
It's an image of a female Tiger shark in front of a scuba diver. We can mesure clearly the size of the animal in front of the diver. The water is crystal clear.
#canonphotography
Avalik
Bytes Europe

66 Million-Year-Old Fossilized Vomit Is Found in Denmark byteseu.com/695415/ #Denmark #FishAndOtherMarineLife #fossils #museums #Paleontology #sharks #vomit

Bytes Europe · 66 Million-Year-Old Fossilized Vomit Is Found in DenmarkLet’s be candid here. Vomit is something you want to get rid of. You don’t want it hanging around for a day, or an hour, or even a few minutes.And certainly not for 66 million years.And yet, scientists say, vomit that old has been found in the Cliffs of Stevns, a white chalk cliff and UNESCO World Heritage site on the Danish island of Zealand.Sometime in the Cretaceous period, a shark, or perhaps another kind of fish, made a meal of some sea lilies. But sea lilies “aren’t that great to eat, because they are almost only skeleton,” said Jesper
Avalik
Doreen Fräßdorf

Seit mehr als 420 Millionen Jahren haben Knorpelfische – Haie, Rochen und Seekatzen – die Ozeane durchstreift und dabei fünf Massenaussterben überlebt. Doch nun zeigen ein Bericht der IUCN und eine Studie ein erschreckendes Bild: Ein Drittel aller Haie, Rochen und Seekatzen weltweit ist vom Aussterben bedroht...
#MarineConservation #Haie #Sharks #Rochen #IUCN #OceanProtection #SaveTheOceans #Artenschutz #Overfishing

artensterben.de/haie-und-roche

Beifang Rochen
artensterben.de · Haie, Rochen und Seekatzen: Ein Drittel steht vor dem AussterbenWissenschaftler warnen vor einem zunehmenden Verlust dieser Arten und fordern dringend Maßnahmen, um Überfischung einzudämmen, den Handel zu regulieren und nachhaltige Fischereipraktiken zu etablieren.
Avalik
Mongabay

A third of the world’s sharks, rays and chimaeras are threatened with extinction, and their numbers have dwindled since 1970, finds a new IUCN report and a study.

Overfishing is the biggest threat to these marine fish, halving their populations in five decades, followed by the international trade in shark parts, habitat degradation and pollution.

By Spoorthy Raman
news.mongabay.com/2025/01/new-

Mongabay Environmental News · New evidence spells massive trouble for world’s sharks, rays and chimaerasEvolution has perfected the world’s sharks and rays for more than 420 million years. Unlike the ammonites or pterosaurs that they once shared the oceans with, sharks and rays persevered through five mass extinctions. But now, their resilience has been put to test by a human folly: overfishing. In 2023, the Java stingaree (Urolophus javanicus) […]
#News#Conservation#Environment
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