The whale struck the boat in the New York, New Jersey port area on Saturday afternoon.
RFK Jr. allegedly used a chainsaw to cut off the head of a dead whale, strapped it to the roof of his minivan, and drove it across state lines roughly three decades.
A whale was spotted breaching on the Atlantic Ocean in New Hampshire and capsized a boat that was carrying at least two passengers.
The North Pacific right whale is critically endangered; according to NOAA's website, there are likely fewer than 500 remaining.
The National Parks Service, Cape Hatteras National Seashore, said the skull measured roughly three feet wide and two feet tall.
The nearly 50-foot yacht, named The Alboran Cognac, was 15 miles from Cabo Espartel in Morocco when an unknown number of orcas began ramming it.