A great white shark was spotted 30 yards from a Cape Cod beach on Thursday, as shark alerts lit up the Sharktivity app during the busiest time of shark season.

Four shark alerts were sent out on the Atlantic White Shark Conservancy’s Sharktivity app on Thursday morning, as the apex predators hunt for seals close to shore. Alerts are issued when a white shark sighting is confirmed close to a public beach.

“White shark spotted 30 yards off Nauset ORV (Orleans) heading north,” reads the shark alert on the Sharktivity app.

“White shark spotted a quarter mile off Nauset Public Beach,” another alert reads.

August has been the busiest month for shark activity along the Cape in recent years.

Last year, August had the most shark detections at receivers, according to the Atlantic White Shark Conservancy’s Logbook. There were 66,097 detections of tagged sharks in August last year, followed by September in second place with 47,177 detections.

Meanwhile, the Atlantic White Shark Conservancy this week posted a video of a large fish that is sometimes mistaken for a white shark.

“Mola molas, or Ocean Sunfish, are seen off the coast of Cape Cod around this time of the year,” AWSC wrote. “Mola molas are typically observed sun-bathing at the ocean’s surface with their large dorsal fins flopping out of the water.

“These fins can be seen from the shore and are commonly mistaken for white shark fins,” the Conservancy added. “As a common rule, if the fin is flapping side-to-side or up and down, it’s most likely a mola mola!”

Next month, there will be a free screening of the new Cape HBO documentary “After the Bite” at the Chatham Orpheum Theater.

The documentary film, directed and produced by Ivy Meeropol, follows the local Cape community after the 2018 death of a young man off the coast of Newcomb Hollow Beach in Wellfleet. The man, Arthur Medici, was the victim of the state’s first shark attack fatality in 82 years.

In “After the Bite,” the documentary explores how the community and vacationers deal with the rising number of shark sightings, while scientists and researchers investigate the reason for their sudden increase.

Following the Sept. 21 screening in Chatham, Meeropol and shark researchers Greg Skomal and Megan Winton will answer audience questions.

The screening and Q&A is a free event, but registration is required on Eventbrite.