The defense attorney for a tourist from Washington state accused of hurling a coconut-sized rock at an endangered Hawaiian monk seal says his client was trying to protect sea turtles and has since been physically assaulted, threatened and doxed.

Igor Lytvynchuk, 38, of Covington, Washington, is scheduled to appear in U.S. District Court in Honolulu Wednesday on charges of harassing and attempting to harass a protected animal.

Earlier this month, a witness recorded what prosecutors say was a video of him throwing the rock at a Hawaiian monk seal at a Maui beach. He later made arrangements to surrender in the Seattle area as special agents with the National Oceanic and Atmospheric Administration were seeking to arrest him, prosecutors said.

The video drew widespread condemnation and demands for prosecution in Hawaii, including from Maui's mayor. Scientists identified the seal as an adult male known as "R404," NOAA said.

According to prosecutors, a state Department of Land and Natural Resources officer investigated a report of Hawaiian monk seal harassment in Lahaina, the community that was largely destroyed by a deadly wildfire in 2023. A witness showed the officer video of the seal swimming in shallow water while a man watched from shore.

The video showed Lytvynchuk throwing the rock, directly at the seal, narrowly missing its head, prosecutors said in a criminal complaint.

Maui resident Kaylee Schnitzer, 18, told HawaiiNewsNow she witnessed the incident while taking photos nearby.

"What he was picking up was like a rock the size of a coconut," Schnitzer said. "It wasn't no small rock. It was the size of a coconut. And he threw it right, directly aiming towards the monk seal's head."

When a witness confronted Lytvynchuk, he said "he did not care and was 'rich' enough to pay any fines," according to the complaint.

Afterward, a man "brutally assaulted" Lytvynchuk, his defense attorney Myles Breiner told The Associated Press. Lytvynchuk declined to file a police report on the assault, the attorney said.

Breiner explained his client had been to Hawaii previously and was familiar with sea turtles, but not Hawaiian monk seals. Lytvynchuk is a fisherman and thought the seal was an aggressive sea lion, the lawyer said.

"So his response was not to hurt this monk seal, but to get it away from the turtles," Breiner said.

The incident shows NOAA must do more to educate the public about protecting Hawaiian monk seals, Hawaii's U.S. Sen. Brian Schatz, a Democrat, said in a statement.

Since the video surfaced, Lytvynchuk has faced death threats and doxing, including receiving a package at his home containing what appeared to be feces, Breiner said.

He said his client is being treated unfairly because he's a white outsider. "The vast majority of attacks on monk seal and turtle are by locals," he said.

Lytvynchuk is charged with violations of the Endangered Species Act and the Marine Mammal Protection Act.

Hawaiian monk seals are a critically endangered species. Only 1,600 remain in the wild.

"The unique and precious wildlife of the Hawaiian Islands are renowned symbols of Hawaii's special place in the world and its incredible biodiversity," U.S. Attorney Ken Sorenson said in a statement. "We are committed to protecting our vulnerable wild species, in particular, endangered Hawaiian monk seals."

If convicted, he faces up to one year in prison for each charge. He also faces a fine of up to $50,000 under the Endangered Species Act and a fine of up to $20,000 under the Marine Mammal Protection Act.

In 2016, a man was seen on video appearing to beat a pregnant Hawaiian monk seal in shallow water.