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Hammerhead Sharks

All articles tagged with #hammerhead sharks

wildlifenature1 year ago•2 min saved

Rare Footage Captures Hammerhead Sharks Swirling in 'Cyclones' Around Ancient Volcano

Rare footage from Netflix's new wildlife documentary series "Our Living World" captures a school of hammerhead sharks circling Cocos Island in the Pacific Ocean, drawn by mysterious signals from the seabed. Scientists are still unsure how and why the sharks navigate across vast ocean expanses to convene at this volcanic oasis, but believe they may gather to relax, socialize, and find mates. The series aims to highlight the intricate connections that support life on Earth, showcasing astonishing scenes like the hammerhead shark assembly, which reveals the interconnectedness of individual animal lives to a much bigger picture.

via Livescience.com|

#cocos-island #hammerhead-sharks #pacific-ocean

wildlife1 year ago•5 min saved

"Divers Capture Incredible Footage of Feeding Hammerhead and Tiger Sharks"

Divers in Bimini, Bahamas, were captured on film hand-feeding huge hammerhead and tiger sharks, showcasing the sharks' power and grace. The Bahamas is known for its diverse shark population, including hammerhead, tiger, bull, reef, lemon, and nurse sharks. While hammerhead sharks are generally harmless to humans, tiger sharks are known to be dangerous, with recorded attacks and fatalities. Despite a shark attack in 1997, photographer Mike Coots became fascinated by sharks and dedicated his life to photographing them.

via Daily Mail|

#bimini #diving #hammerhead-sharks

marine-biology2 years ago•5 min saved

"Understanding the Increase in Hooked Tarpon Consumption by Sharks"

Research led by biologists at the University of Massachusetts Amherst has quantified the rate at which great hammerhead sharks are eating Atlantic tarpon hooked by anglers at Bahia Honda, Florida, revealing a 15.3% depredation rate for tarpon fought for more than five minutes. The study suggests that increased reports of depredation are expected as the great hammerhead shark population stabilizes, posing a challenge for both tarpon conservation and angling. To manage the health of both species, researchers recommend solutions that minimize impact on tarpon, hammerheads, and anglers, such as using fishing gear to land tarpon faster and avoiding fishing during outgoing tides when depredation events are most likely to occur.

via Phys.org|

#conservation #depredation-rate #fishing

animal-news2 years ago•3 min saved

2023's Unforgettable Animal Encounters: Mystery Orbs, Tree-Dwelling Shrimp, and Moon-Worshiping Hammerhead Sharks

The year 2023 brought a plethora of bizarre animal news, including sea spiders that can regrow complex body parts, the discovery of the cause behind mysterious octagons on the seabed, cartwheeling snakes as a defense mechanism, a new species of alien-like Antarctic feather star, hammerhead sharks gathering in large numbers during the full moon, a strange golden orb found on the seabed off Alaska, three-eyed dinosaur shrimp appearing at Burning Man, tree-dwelling shrimp found in Indonesia, and the rediscovery of a mole species believed to be lost since 1936.

via IFLScience|

#alien-like-feather-star #animal-news #cartwheeling-snakes

marine-biology2 years ago•2 min saved

Unveiling the Mystery: How Hammerhead Sharks Acquire Their Unique Hammer

Scientists at the University of Florida have documented the development of bonnethead sharks, the smallest species of hammerhead sharks, revealing how their skulls stretch and distort into their distinctive hammer-like shape. Through careful examination of preserved embryos, the researchers observed how the sharks' heads widen and push backward towards the gills, creating the final shovel-like shape. This unprecedented look at hammerhead development provides insights into the formation of these unique creatures and sets the stage for future experiments to understand how they control their head shape and the evolutionary reasons behind their unusual features.

via Phys.org|

#bonnetheads #embryonic-development #hammerhead-sharks

marine-biology2 years ago•3 min saved

"Mysterious Gathering of Female Hammerhead Sharks in French Polynesia: A Lunar Phenomenon"

Female great hammerhead sharks have been gathering in French Polynesia every summer for over a decade, with numbers peaking around the full moon. Researchers recorded 54 female sharks and one of undetermined sex in the summers of 2020 and 2021. The sharks gather around openings in two neighboring atolls, Rangiroa and Tikehau, indicating the area is an aggregation site. The sharks are likely drawn to the area by external factors linked to the lunar cycle and the presence of ocellated eagle rays. The number of sharks peaked shortly before and after a full moon, possibly due to increased moonlight enhancing their hunting abilities. The researchers are investigating whether the atolls serve as nursery grounds for great hammerhead sharks.

via Livescience.com|

#aggregation-site #french-polynesia #hammerhead-sharks

nature2 years ago•2 min saved

Close Encounters: Sharks and Bears Surprise Gulf Coast Visitors.

A group of hammerhead sharks were spotted circling boaters and swimmers in the Gulf of Mexico off the Alabama coast. Witnesses said the sharks were chasing smaller school fish and were not interested in humans. Marine biologists say hammerheads are common in the Gulf of Mexico and generally do not pose a risk to swimmers.

via New York Post |

#alabama-coast #boaters #gulf-of-mexico

science2 years ago•3 min saved

Hammerhead Sharks' Breath-Holding Technique for Staying Warm in Deep Waters

Hammerhead sharks have been observed to dive more than 2,600 feet from tropical surface waters into the ocean’s frigid depths multiple times every night to hunt for fish and squid, tolerating a 68-degree Fahrenheit plunge in temperature to dine. A study published in the journal Science shows how one species, Sphyrna lewini or scalloped hammerhead sharks, stay warm during their nightly dives: They skip the frills and close their gills, essentially holding their breath. This strategy for regulating a cold-blooded fish’s temperature has never been observed before and distinguishes them from high-performance fish like great white sharks or Atlantic bluefin tuna that use vastly different strategies to tolerate extreme cold.

via The New York Times|

#body-temperature #conservation #deep-diving