Peter Gausmann

How Great Hammerheads Survive on a Diet of Other Sharks Great hammerhead sharks eat other large sharks. They can survive on a single blacktip shark every few weeks. Here's what you need to know!

Thanks SyFy for sharing our recent great hammerhead energetics paper! And for pairing it with a Sharknado promo, which feels like the bigget win of all. 🌊🐟🧪🦑

www.syfy.com/syfy-wire/ho...

A rare jaguar roams Arizona. Border wall expansion imperils its future. The sightings highlight the importance of the San Rafael wildlife corridor, which faces threats from a proposed border wall expansion.

This is jaguar #4! 🐆
Do you want to meet the cats detected by our cameras in southern Arizona?

Visit our website: www.wildcatresearch.arizona.edu/meetthecats

#WildCatResearchUA #WildlifeConservation #ArizonaWildlife #SonoranDesert #Jaguars #citizenscience

www.washingtonpost.com/nation/2025/...

You're beautiful enough! 😉👍🏻

YouTube video by Fish Guy Photos Bull Shark in the Hamptons

Word is they love the Hamptons.
www.youtube.com/watch?v=yMX5...

Increased Abundance and Nursery Habitat Use of the Bull Shark (Carcharhinus leucas) in Response to a Changing Environment in a Warm-Temperate Estuary - Scientific Reports Scientific Reports - Increased Abundance and Nursery Habitat Use of the Bull Shark (Carcharhinus leucas) in Response to a Changing Environment in a Warm-Temperate Estuary

A bull shark in New York is making news this week.

Here’s our analysis from a few years ago showing how climate change is warming seas, resulting in bull sharks going further north.

www.nature.com/articles/s41... @dogfishwalker.bsky.social is lead.

🧪🌎🦑🦈🐠

Hammerhead sharks eat other sharks—and it’s worth the risk Apparently, sharks are food, not friends.

Thank you @popsci.com for covering our recent paper on great hammerhead energetics! 🐟🧪🌊🌍 Read the piece here:

www.popsci.com/environment/...

Diet plan? For the great hammerheads, it's shark-eat-shark - Oceanographic Scientists are beginning to uncover the energetic-benefits behind the great hammerhead's preferred taste for other sharks.

Diet plan? For the great hammerheads, it's shark-eat-shark - Oceanographic

We’re thrilled to welcome Dr. Diego Cardeñosa as a keynote speaker at SI2026, where he will share insights from his work, highlighting innovative approaches to conservation, policy impact, and enforcement of wildlife trade regulations.

🔗 si2026.org

Bravo, Ursula! You really got ripped off! 👏🏻👏🏻👏🏻🥂🍾

Register for Sharks International 2026 is today!

🦈 Join a global community at #SI2026 in Sri Lanka, 4-8 May! Registration includes access to all sessions, keynotes, sides events, and the welcome reception. Don’t miss out, register now for #SI2026!

🔗https://si2026.org/

Hard to believe it has been over 10 years since I discovered this NEW SPECIES of ghost shark during #AlienShark on @SharkWeek. I named the species the SeaFarer’s Ghost Shark (Chimaera willwatchi) for my hard working friends onboard the fishing vessel Will Watch. 🤩🦈

This animal has a built-in taser to stun sharks Electric rays are staying out of the stomachs of sharks by shocking them—with up to 200 volts.

Electric rays' shocking power is used for hunting, to zap their prey, and for self-defence too, a new study shows.
These rays have evolved a means of deterring large sharks by scaring them away with a zap of powerful electrical discharges.

More here: www.nationalgeographic.com/animals/arti...

Looks really cool! 😅🛻🦈👍🏻

Indeed... one of the many mysteries we still have to unravel! We're super happy to share this paper led by @jcuofficial.bsky.social PhD candidate Joel Gayford!

The story of Alisha: how a recovered tag revealed one great white shark’s epic voyage — Dr. Jack A. Cooper In 2024, a fisher in Indonesia contacted shark experts to discuss a recovered shark tag. This set in motion a chain of events that produced three startling findings: (1) that the tag had been…

The story of Alisha: how a recovered tag revealed one great white shark’s epic voyage — Dr. Jack A. Cooper

Countries seek urgent CITES protection of more than 70 sharks and rays Several proposals seeking greater protection of more than 70 shark and ray species from commercial trade were raised this week for deliberation at the 20th meeting of CITES, the global convention on t...

Countries seek urgent #CITES protection of more than 70 sharks and rays, writes @mongabay.com.

These listings could be a “key catalyst for conservation action,” says @lukedavid301.bsky.social.

🌎 bit.ly/40yHDHx

Although Journey only seldomly were touring across Europe, I had the luck to see this band one time live....it was a blast! 🙏🏻🎸♥️

🧵12 #WhiteSharks #Australia #DNA
Great white sharks, which can live for over 70 years, were listed in Australia as vulnerable to extinction in 1999.

🧵11 #WhiteSharks #Australia #DNA
With fewer than 500 breeding adults the loss of just one breeding animal is a serious blow to the whole population. White sharks are vital for the health of the ocean. They occupy the top of the food web, keeping it in balance.

Scientists tested great white shark DNA. Now we know how many live off Australian beaches They’re our most feared apex predator of the sea, but new research is upending what we think we know about great white sharks.

🧵 #WhiteSharks #Australia #DNA
Bianca Hall
June 26, 2025 — 12.00pm
"There could be fewer than 500 adult breeding great white sharks across almost 60,000 kilometres of Australian coastline, a figure which challenges perceptions the number of white sharks is increasing.

New paper out! We found that a climate change-driven warming off Sydney has increased the amount of time bull sharks spend around Australia's biggest city. #sharks #climatechange #sydney #bullsharks
@jcuofficial.bsky.social @drrossdwyer.bsky.social @imos-aus.bsky.social @saveourseas.bsky.social

Ever wondered what factors influence the number of shark bites?

Delphine Duval led a review of scientific evidence of factors proposed to affect shark-bite risk.

doi.org/10.1016/j.ge...

Sharks freeze when you turn them upside down – and there’s no good reason why Rather than a clever survival tactic, tonic immobility might just be ‘evolutionary baggage’.

Some sharks freeze when you turn them upside down – and there’s no good reason why... anymore. New study 📄 theconversation.com/sharks-freez... by Gayford & Rummer at @jcuofficial.bsky.social
#sharkscience #evolution

I have read stories about the hunting strategies of salties, and they seem to be really intelligent.....real beasts! You should be extremely cautious where they occur 😬🐊

A shark scientist reflects on Jaws at 50 Ars chats with marine biologist David Shiffman about the film’s legacy—both good and bad.

O.k. o.k. I see everyone is posting here on the 50th anniversary of "Jaws", so here's my story: I was eight years old when I saw this movie. I rember that I've tried to get as fast as I can out of the public swimming pool after jumping in because of the sharks 😅🤣🤣🤣🦈

arstechnica.com/science/2025...

New paper! We review how to use AI to analyze animal borne camera tag footage. Important with how large these datasets are getting!

besjournals.onlinelibrary.wiley.com/doi/10.1111/...

Do shortfin mako Isurus oxyrinchus hunt dolphins actively? Direct evidence of shark predation on cetaceans is scarce, making it difficult to differentiate between stomach contents that have been scavenged and actively hunted. This study reports the presence ...

Badass shark eats badass prey. 🧪🦈🐟🦤🦑🐳 onlinelibrary.wiley.com/doi/10.1111/...

Time has changed quickly since then and the publication process has become much faster...with 10-15 scientific papers about sharks and rays published each day! So this phrase may be a little bit outdated it seems.

New Paper: Another collaborative multi-species shark tracking effort predicts delays in southerly migration timing under warming oceans. 🦈 🐟🧪

conbio.onlinelibrary.wiley.com/doi/10.1111/...