Kostis, an endangered Mediterranean monk seal, was said to be a "mascot" for the island of Alonissos. Authorities are now searching for his killer.
It is estimated that there are only around 1,400 monks seals left living in the Hawaiian Islands.
The animal seemed unfazed by the paddleboarder sitting directly behind it.
The deaths are the latest in a string of what are feared to be intentional killings.
Populations of the apex predator are growing in California waters, a new study has indicated.
A group of concerned animal lovers managed to save an elephant seal pup after it was discovered trapped in a storm drain.
It is hoped the tiny, malnourished pup will recover and be released into the sea.
An estimated 2,778 seal pups were born on a stretch of coastline in the U.K.
"It was absolutely amazing to see something so dramatic and intense in person," said 27-year-old Haydn Thomason.
Scientists have noticed significant ecological changes in the North Pacific near Alaska, including premature whales and slimmer seals, which they have linked to rising temperatures.
This picture of Snooty the lemon shark was taken by Galice Hoarau and submitted to the 2019 Ocean Art Underwater Photo Competition.
An English conservation group responded angrily to the news that three baby seals died after people refused to heed the warnings of experts who suggested they should not interact with the animals.
Report from World Animal Protection reveals cruel practices at aquariums and zoos around the world.
A post-mortem examination conducted by the Cetacean Strandings Investigation Programme suggests the animal was killed deliberately.
Cormorants, seals and flamingos were found to make up around 80 percent of the diet of three lionesses studied.
"We will not allow inexcusable and reprehensible violations of that trust to erode decades of honorable service, teamwork, and progress by the members of USSOCOM," General Raymond Thomas III wrote to personnel in an email obtained by Newsweek.
Michael Hayden sprang to the defense of retired Navy SEAL Admiral William McRaven, who Trump attacked on Sunday.
The boys thanked the rescuers for all their efforts and vowed to live life to the full following their "miracle" escape.
The boys are shown introducing themselves and thanking everyone involved in the ongoing rescue attempt.
"They're a seal-eating species. It's what they do."