SAN JOSE, Calif. (MCT) — After a morning spent whale watching in the Monterey Bay, the passengers on the Point Sur Clipper on April 27 didn’t notice anything amiss when they first spotted the humpback.

But unlike the other whales, the 25-foot-long young adult stuck near the surface – and it didn’t dive down to feast on the blooms of krill that attract humpbacks to the bay. “It wouldn’t fluke up,” said Nancy Black, a marine biologist on board the ship that day, referring to the picture-perfect tail flip that humpbacks display before diving to feed. Looking closer, the passenger on the Point Sur also noticed several buoys were strangely close to the whale, trailing behind it.

Black called the U.S. Coast Guard, which soon discovered that the whale was ensnared in a crab pot line. That led to a weekslong rescue effort involving federal and state agencies, six nonprofits, several businesses and dozens of volunteers, who battled rough seas from Monterey to Santa Barbara to give the humpback a shot at survival.

In recent weeks, four entangled whales were reported off the West Coast. Two were freed, including a humpback let loose May 6 off the Oregon coast. Crews were unable to attach satellite telemetry tags to two others, and they have not been spotted again.

Once snagged, it wasn’t easy to free the whale, the rescuers said as they recounted the adventure. After Black called the Coast Guard shortly after noon that Sunday, the Guard activated the Whale Entanglement Team, a trained volunteer squad affiliated with the National Marine Fisheries Service. Affectionately called WET, the squad stayed close to the whale, giving the fare-paying passengers on the Point Sur Clipper an extra-long trip.

By 3 p.m., the team had clipped a satellite tag to the gear already wrapped around the whale. Now, wherever the humpback went, they could find it. And that was key, said Pieter Folkens, team leader and marine mammal expert.

Early the next morning, a blustery day with choppy seas in the Monterey Bay, the team found the whale again. It was still struggling, breathing often at the surface and swimming slowly.

Armed with long poles and knives, the crew leaned over the rocking boats, struggling to snip the line. They managed to remove the crab pot and 300 feet of line, but another 50 feet of line remained wrapped around the whale’s tail, dragging several buoys. By now the seas were churning, swells grew to 10 feet high, tossing the boats up and down.

“I’m calling over, ‘You’ve got to stop,’ ” said Peggy Stap, a WET member affiliated with the nonprofit Marine Life Studies in Monterey.

Fearing for their safety, the crew turned back.

Team members then spent the next several evenings trying to figure out the best way to free the whale.

Meanwhile, the whale swam south, burdened by the line that clenched its tail. As the winds continued to blow, the humpback zigged and zagged. On May 1, it strayed too far offshore from Big Sur to mount a rescue.

Seven days later, rescuers geared up and drove south to Point Arguello, but at the last minute high seas forced them to stop.

By now, the whale was shedding weight, Folkens said. Its tracks were becoming jagged, circular. Rescuers waited onshore, anxiously watching and waiting, Stap said.

As the days passed, the whale’s chances of recovery dropped. The tissue in its tail had begun to die, said Justin Viezbicke, a WET coordinator with the National Marine Fisheries Service.

Finally, early in the morning of May 14, 17 days after the whale had first been spotted, some 20 rescuers – split between four boats – gathered near Santa Barbara. The water was calm, and the whale was close.

Working with hooks and knives, the crews worked for more than an hour. And just before 9 a.m., the last loop was removed. After swimming some 700 miles entwined in rope, the whale was free.