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

The salmon hat craze was first observed in 1987 when a female orca in the Puget Sound area of the northeast Pacific was seen carrying a solitary dead fish on her nose. Within a few weeks the behavior was picked up by members of other pods, suggesting something about it must have appealed.

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.

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

Orcas have been spotted wearing dead salmon on their head like hats, a trend that hasn't been popular with the whales since the 1980s.

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.

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.

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.