(CNN)A New Zealand man who speared an endangered sea lion says he did it to protect his partner, adding: "It needed a stab. It will live."
Matt Kraemer posted on Facebook that he and his partner were diving for paua -- a type of abalone -- on Friday when they encountered a "particularly aggressive" sea lion with "lion-sized jaws."
"It actually climbed out of the water and threatened to attack on the beach," Kraemer, who lives in the South Island city of Dunedin, said in the Facebook post. "I had to stab it with a spear to defend my terrified dive buddy!
"This was no ordinary playful sea lion. I poked it lots of times with no effect, it needed a stab. It will live."
Kraemer's partner, Jo Kraemer, told CNN that the sea lion was over 2 meters (6.6 foot) long, and continued to charge at them aggressively as they tried to swim away.
"I am aware that it is an endangered animal and we were in its habitat, and that free diving in the ocean is dangerous. We did not intend to hurt it, we just needed it to leave us alone so we could exit the water safely," she said.
In a Facebook comment on her partner's post, she said that she was "a bit scared to go back in now to be honest."
"It was scary," she said. "Matt was just defending me. He had been very tolerant up to that point."
Matt Kraemer wrote on Facebook that the stab wound, which was made in "self defense," was about 8mm (a third of an inch) wide and 30mm (1.2 inches) deep.
New Zealand sea lions are one of the rarest sea lion species in the world, with an estimated 12,000 left. Under local law, anyone who kills a sea lion could face up to two years in prison or a fine of up to 250,000 New Zealand dollars ($168,000).
New Zealand Police said Friday's incident was not under investigation.
New Zealand's Department of Conservation (DOC) said it could not comment on Friday's incident.
However, DOC biodiversity ranger Jim Fyfe said humans and sea lions tended to interpret each other's behaviors differently, which could lead to "cross-species misunderstandings."
"There's a risk of imposing our own biases and fears when they're not actually justified," he told CNN in a statement. "Sea lions need space ... they are not trying to attack humans, but want to protect their space."
New Zealand Sea Lion Trust -- a non-profit organization that promotes the conservation of the animals -- said in a statement that it was "never OK to harm a sea lion because you're scared."
"While we can appreciate that this individual was scared and felt he was acting defensively, none of the behaviors demonstrated by the sea lion suggest aggression to us," the trust's chairwoman Jordana Whyte said in a Facebook post. "We do not condone this man's response to typical curious sea lion engagement, though we do have empathy for how frightened he was."
Whyte told CN