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Fledgling seabirds in Hawaii are easy prey for tiger sharks

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Fledgling seabirds in Hawaii are easy prey for tiger sharks


A tiger shark lunges out of the water to grab a young albatross. A new study has revealed that fledgling seabirds attract tiger sharks during the summer at Hawaii’s French Frigate Shoals. Image via Joe Spring/ NOAA/ University of Hawaii Manoa.

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  • Tiger sharks gather around Hawaii’s French Frigate Shoals in summer to prey on newly fledged seabirds, a new study has revealed.
  • The influx of tiger sharks pushes smaller shark species to change where and how they hunt.
  • Seasonal seabird movements strongly influence the balance of the entire local shark ecosystem.

When seabirds fledge, northwestern Hawaii shark ecosystems are disrupted

There are several shark species that patrol the waters of the French Frigate Shoals atoll in northwestern Hawaii. In December 2025, scientists reported that the population of tiger sharks surges during the summer in some areas of the atoll. That’s because those sharks are opportunistically preying on newly fledged seabirds, primarily albatross chicks. Moreover, that high seasonal influx of tiger sharks forces smaller sharks in those waters to change the way they use their habitat.

Chloé Blandino, at the Hawaii Institute of Marine Biology Shark Lab, is the lead author of the paper on this study. She said in a statement:

We discovered that tiger sharks gather around small islands in summer to hunt fledgling seabirds, which, in turn, forces other smaller sharks to adjust their habitat use. It’s a clear example of how a seasonal food source can influence habitat use by an entire predator community.

The researchers published their findings in the peer-reviewed journal Ecosphere on December 2, 2025.

Tiger sharks go after young seabirds

The French Frigate Shoals in northwestern Hawaii is a crescent-shaped barrier reef with small sandy islands. These tiny islands provide critical habitat for seabirds, green sea turtles, and Hawaiian monk seals. The seabirds include species like albatrosses, tropicbirds and terns.

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Blue ocean with a crescent-shaped atoll and some clouds.
This image of the French Frigate Shoals in the northwestern Hawaiian Islands was captured by an astronaut in 2003. It shows the crescent shaped reef hugging a lagoon with small sandy islands. Image via NASA.

During the summer, tiger sharks converge in the atoll waters to prey on fledgling seabirds. These young birds, which hatched just months earlier, are just learning to fly. As a result, they have not yet become adept at avoiding predators.

Tracking shark behavior

The researchers targeted three species known to frequent the atoll waters: tiger sharks (Galeocerdo cuvier), Galapagos sharks (Carcharhinus galapagensis), and gray reef sharks (Carcharhinus amblyrhynchos).

They surgically inserted acoustic transmitters in the sharks, each one emitting a unique coded signal. Their work followed careful animal handling protocols that University of Hawaii researchers developed to minimize harm to the sharks.

In addition, the researchers installed underwater receivers to pick up sounds from each shark’s transmitter. These receivers were placed in habitats occupied by the sharks: near coral reefs, as well as in deep and shallow lagoon areas. As a result, when a shark swam near a receiver, the signal from its transmitter was picked up, recording a timestamped location for the animal. This allowed the scientists to track each shark’s movement.

Blue ocean with a crescent-shaped atoll. It is marked with blue, yellow, and red dots within circles and oblongs of dotted lines.
Another image of the French Frigate Shoals, marked with the locations of acoustic receivers. Yellow dots indicate the locations of receivers in the shallow lagoon area and near small sandy islands. Blue dots are for receivers at the deep parts of the lagoon. And red dots are receivers near the coral reef. The dotted boundaries are data analysis regions used by the scientists. Image via Blandino, C. A., et al./ Ecosphere (CC BY 4.0)

Extra influx of tiger sharks affects other sharks

For two years, the scientists tracked 128 sharks at the French Frigate Shoals. Their data revealed interesting information about the sharks’ movements.

They found that tiger sharks are more abundant in the shallow lagoon of the atoll in summer, around the time that albatross chicks are fledging. They were taking advantage of easy prey since the chicks were not yet adept fliers.

Moreover, the summer influx of tiger sharks also affected the dynamics of the atoll’s shark community. Grey reef sharks, which are smaller than tiger sharks, moved out of the lagoon areas occupied by tiger sharks. They retreated to waters near the reef to primarily hunt fish. Meanwhile, Galapagos sharks changed the timing of their hunts in some places. They also preyed on monk seal pups, avoiding albatross chicks.

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Towards the end of summer, surviving fledgling seabirds, along with their parents, dispersed farther out to sea. With no more easy prey to take down, most tiger sharks moved out of the shallow lagoon, and the other sharks returned to their usual ecological niches.

Seabirds have a big impact on shark population

Carl Meyer, also at the Hawaii Institute of Marine Biology Shark Lab, is a paper co-author. He and his colleagues noted that if the birds lost their habitat to adverse weather, it would have a significant effect on the shark community, the Hawaiian monk seals, and of course, the seabirds themselves.

Two seals on a beach looking at two sharks in shallow water.
Two Hawaiian monk seal pups watching two Galapagos sharks swimming in shallow water at Trig Island in the French Frigate Shoals. Image via Carl Meyer/ University of Hawaii Manoa.

Meyer commented:

This study highlights the far-reaching impact of seabirds, showing they can shape the movements of top predators like tiger sharks, which then ripple through the entire food web. Understanding these predator-prey links is crucial for managing Hawaii’s marine ecosystems.

Bottom line: When seabirds fledge at the French Frigate Shoals atoll of northwestern Hawaii, tiger sharks move in to prey on the fledgling seabirds, disrupting shark populations in the area.

Source: Seabirds mediate intraguild and competitive interactions in a shark community

Via University of Hawaii Manoa

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Read more: Teenage Greenland sharks’ hangout spot revealed in new study

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Hawaii topples Rockhurst in 4 sets in nightcap despite 24 service errors | Honolulu Star-Advertiser

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Hawaii topples Rockhurst in 4 sets in nightcap despite 24 service errors | Honolulu Star-Advertiser




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Nick Taylor back to defend Sony. Will it be the last time its played?

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Nick Taylor back to defend Sony. Will it be the last time its played?


Nick Taylor won the Sony Open in Hawaii a year ago in dramatic fashion, as he needed a playoff to earn his fifth PGA Tour win. It was the third year in a row the Canadian won a tournament in a playoff.

This year, he’s back on the island of Oahu to defend his title at Waialae Country Club in Honolulu. The Sony, traditionally the second tournament of the season, gets lead-off honors in 2026 after The Sentry was canceled.

With rumors swirling about significant schedule changes coming in 2027, the Sony Open might fall off the radar.

“It’ll be a place that I’ll miss a lot, not just this tournament, but the state of Hawaii,” Taylor said during his media session Wednesday after his morning pro-am. “It’s one with Maui being such an awesome event over the years feeling like such an accomplishment to play there. Other than last couple years if win you’re playing in that golf tournament. It just felt like it was a great start to the year.

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“Nothing set in stone. It’ll still be a place I’m going to visit. I don’t know about annually after that. We’ll see. My wife, we’re going to miss it. Yeah, it’ll be a year that I guess we won’t take it as much for granted this year with potentially things changing.”

And if the Hawaii swing does become a thing of the past, the PGA Tour season is likely to have a later start on the calendar.

“You know, if more of an offseason is something that results in this, I have two young kids, that’s something would be very valuable,” he said of those schedule rumors. “I know as much as probably everybody in this room, so there is a lot of the things I don’t quite know. Extending the offseason I think nobody would complain about that, so that would be something I would definitely take advantage of, spend more time with family and be at home.”

Collin Morikawa, meanwhile, is playing the Sony for the first time since 2021.

“I love it. I’ve taken this event off the past couple years and I miss it. It’s a fun event,” he said. “For me, family ties to Hawaii. Always good to be out here. Even the last couple years that I haven’t played we came over for a couple days and hung out for vacation. Just an amazing island to be on.”

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Morikawa’s grandparents were born in Lahaina on Maui, where the Sentry is normally held.

“For me, someone that has ties to Hawaii, you never want to see something go away for good,” he said. “It just makes you realize, stay present this week and enjoy it as much as you can and see what kind of memories we can make. Hopefully finally find a way to win on the islands out here.”



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Here’s How to Protect and Expand Social Security, According to One Hawaii Senator | The Motley Fool

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Here’s How to Protect and Expand Social Security, According to One Hawaii Senator | The Motley Fool


With approximately six years until Social Security benefits must be cut, one group of Hawaii legislators has come up with a simple plan to prevent a shortfall.

It’s no secret that Social Security, as we know it, is in a pinch. According to the Committee for a Responsible Federal Budget (CRFB), the Social Security and Medicare trust funds are six years away from insolvency.

The combination of more retirees, fewer people in the workforce, and the impact of President Trump’s big, beautiful bill (OBBBA) leads the CRFB to estimate a 24% Social Security cut in late 2032 if nothing is done. In addition, retirees could face an 11% cut in Medicare Hospital Insurance payments.

This isn’t the first time the trust funds have been in trouble. In 1982, the fund that helped cover the cost of monthly Social Security benefits faced a significant shortfall and was forced to borrow from other funds to pay benefits on time. Congress was able to work together long enough to raise taxes on some, adjust benefits, and prevent insolvency.

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With a similar problem facing the trusts 44 years later, Hawaii’s Senator Brian Schatz and Representative Mazie Hirono (along with Rep. Jill Tokuda) believe they have a simple solution. Here’s what their proposal, called the SAFE Social Security Act, would do.

Image source: Getty Images.

Lift the payroll tax

To ensure payroll taxes apply fairly across the board and that the rich pay their share, the proposal includes a plan to phase out the payroll tax cap so that no one can stop paying into Social Security once their income hits $184,500.

Adjust benefit calculations

The trio suggests adjusting the way current benefits are calculated, a move that would increase the average monthly benefit by more than $150.

Update how cost-of-living adjustments are determined

As of today, cost-of-living adjustments (COLAs) are based on increases in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) from the third quarter of the previous year to the third quarter of the current year. In theory, using inflation tied to CPI-W is supposed to help retirees keep pace with the rising cost of living.

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For years, however, senior citizen advocacy groups have insisted that the wrong index is being used because working adults and retired adults spend money differently. For example, an older retiree is likely to spend more on medical care than a younger person still in the workforce.

The Hawaii legislator’s plan would address the issue by basing the COLA on an index that tracks inflation related to seniors’ spending. Specifically, they’re talking about the Consumer Price Index for the Elderly (CPI-E).

Sen. Schatz believes that the SAFE Social Security Act will expand Social Security and put more money in the hands of those who rely on it. It will also strengthen the program for the next generation of retirees, ensuring today’s workforce has something to look forward to.



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