75-year-old man on the Big Island was treated for wounds to his leg after an apparent shark encounter just after 10 a.m. Tuesday.

It happened in an isolated area between 'Anaeho'omalu Bay and Keawaiki in the Waikoloa area of north Hawai'i.

The man was paddling outrigger canoes with three other people about a half-mile off shore when one of the boaters notices the victim stopped paddling.

The victim said a shark bit the hull of the canoe and knocked him into the water, where he fended the shark off with his paddle.

Though the victim could not identify the shark species, he did estimate its length was the same as his 12-foot-long canoe.

The other members on the canoe helped him get back to shore, where a friend took him to North Hawaii Community Hospital. 

The fire department conducted a helicopter fly-over of the area but no sharks were spotted, says the DLNR Division of Aquatic Resources (DAR). 

Wednesday morning, another fly-over is scheduled to ensure sharks have not moved into more heavily used areas.

No warning signs have been posted as the area is very rugged and remote, requiring a two-mile hike in to reach the coastline.