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Hawaiian monk seal RK58
Press Release

Hawaiian Monk Seal RK58 Released Back to Kaua‘i After Rehabilitation

  • Species conservation

Endangered Hawaiian monk seal released back to Kaua‘i after rehabilitation at Ke Kai Ola, a dedicated hospital for monk seals on Hawai‘i Island

A Hawaiian monk seal pup rescued on Kaua‘i has been returned to the island after successful rehabilitation at Ke Kai Ola, The Marine Mammal Center’s hospital and visitor center in Kailua-Kona that is dedicated to the endangered marine mammal. The male pup, RK58, was born on July 16, 2018, to monk seal RH58 (Rocky), and involved in a switch with another mom-pup pair on the same beach. 

RK58 was a challenging case, and it was clear after months of rehabilitative work that he would not have survived on his own in the wild,” says Dr. Claire Simeone, the Center’s Hospital Director at Ke Kai Ola. “We are thrilled that he has learned the skills he needs to successfully forage, and that he has a second chance at life back on Kaua‘i.

Pup switches are a natural occurrence that are observed annually in the Northwestern Hawaiian Islands, but are less common in the Main Hawaiian Islands due to the lower density of moms and pups. Earlier this year, experts from The Marine Mammal Center and the National Oceanic and Atmospheric Administration (NOAA) successfully rehabilitated Sole, a young male pup born on Moloka‘i that was also involved in a mom-pup pair switch, the first time a rescue effort was made in response to this behavior in the Main Hawaiian Islands. 

“As we do with all our monk seal moms and pups, we worked hard to ensure Rocky had a successful nursing period. We did everything we could to keep Rocky and her pup together, but despite our best efforts, Rocky stopped nursing her pup and we had to intervene to save the pup’s life,” says Jamie Thomton, the Kaua‘i Marine Mammal Response Program Coordinator with NOAA’s National Marine Fisheries Service. 

However, we are fortunate that the Hawaiian monk seal hospital Ke Kai Ola is prepared to accept orphaned pups like RK58.

RK58 is the youngest monk seal rehabilitated at Ke Kai Ola. It took him several months to learn how to eat fish on his own, but in the six months that he was at Ke Kai Ola, he nearly doubled in body weight. Dr. Simeone and her team performed a release examination on RK58 and noted that he was healthy and ready for release. RK58 was approved for release back to his birthplace on Kaua‘i. RK58 will be monitored by volunteers in the Kaua‘i Marine Mammal Response Network, and a satellite tag has been placed to track RK58’s movement and ensure he is thriving in the wild. 

Dr. Simeone accompanied RK58 on a charter flight with Kamaka Air Cargo, which was generously donated by a private donor. In order to ensure that he had acclimated back to his environment, RK58 was monitored in a beach pen for two days before being released on a remote Kaua‘i beach. The Marine Mammal Center, NOAA’s Pacific Islands Fisheries Science Center, Hawai‘i Department of Land and Natural Resources, and Kaua‘i Marine Mammal Response Network volunteers all contributed to RK58’s transport and release. 

“This was an excellent example of the public-private partnerships needed for conservation success,” said Dr. Simeone. 

Conservation takes a village, and endangered Hawaiian monk seals benefit when our communities are inspired to contribute in such an impactful way.

It is rare to rescue a monk seal pup from the Main Hawaiian Islands, and this young pup is only the third pup from the main islands to be rehabilitated by the Center. Rocky’s birth of RK-58 comes a year after she garnered news headlines for giving birth to the first pup ever recorded on Waikīkī Beach in 2017. The Marine Mammal Center is a member of the Pacific Island Region Marine Mammal Response Network and is responsible for monitoring the seals that haul out on Hawai‘i Island. 

The Marine Mammal Center has rehabilitated 27 monk seals since opening Ke Kai Ola in 2014, the majority of which were rescued from the Northwestern Hawaiian Islands. The Center is proud to partner with NOAA to support conservation efforts for the Hawaiian monk seal. Researchers estimate the current monk seal population to be about 1,400 animals, and about 30 percent of those monk seals are alive today directly due to conservation efforts led by NOAA and its partners. 

For more information or to set up an interview on this topic, please contact us at


Header image: photo by Sheila Latta © The Marine Mammal Center / NOAA permit #18786

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