Scientists Baffled By Hundreds Of 30-Foot Sharks Swimming In Massive Shivers Off U.S. East Coast

Swarms of more than a thousand basking sharks, known as shivers, have been seen swimming off the northeast coast of the United States, and scientists don’t know why.

Normally, the massive sharks, often more than 30-feet long, remain alone throughout their lives, or at most in small groups of less than 10. Luckily for nearby residents, the basking sharks use filters like whales to feed and are no threat to humans.