A great white shark that washed ashore at a Cape Cod beach earlier this week is named Koala, and was known to local researchers, investigators said. Its cause of death is still a mystery, as a necropsy was inconclusive.

A necropsy on Koala, the great white shark that washed up dead in Orleans on Oct. 15 was inconclusive. Here's what we know.

There are no obvious signs of how or why a shark that washed up on a Cape Cod beach this week died, the Atlantic White Shark Conservancy said Thursday, adding that this shark had been previously identified by the agency two years ago.

The white shark found washed up on an Orleans beach on Tuesday was named Koala, according to the Atlantic White Shark Conservancy. The shark was seen washed ashore and towed away by police in what they called an atypical call for service.

A necropsy was underway Wednesday to determine the animal's cause of death, according to the Atlantic White Shark Conservancy.