Researchers recently observed a killer whale (Orca) wearing dead salmon on their heads as hats, and believe it or not it's not the first time. It's something that the Orcas were doing back in the 1980s.

Though researchers have some best guesses, nobody seems to know for sure why exactly a killer whale in Washington state was wearing a dead fish as a hat.

A resident orca off the coast of Washington state was recently spotted sporting a dead salmon on its head. The phenomenon was first documented in 1987, when whales from three separate pods were seen wearing salmon like hats.

An especially popular killer whale put a dead fish on his head, in a throwback to a fashion last seen in the 1980s.

A group of orcas off the west coast of North America has brought back a bizarre fashion trend not seen since the late 1980s: wearing a single dead salmon on their heads as if it was a hat. Experts are at a loss to explain why orcas would want to wear fish in the first place,

The fashionistas of the ocean have spoken, and it’s official -- salmon hats are making a comeback among orcas.

Sometimes, nature surprises us with behavior that feels more like a quirky human trend than an animal instinct. That’s exactly what’s happening off the Pacific Northwest coast, where orcas are once again donning “hats” made from dead salmon.