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.

About 40 years ago, researchers noticed a population of orcas had begun swimming around with dead fish on their heads, and now the craze is back

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.

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

West Coast killer whales were last spotted sporting expired salmon in the 1980s, according to Live Science. After a nearly 40-year hiatus, whale watchers and scientists witnessed the resurrected fad last month off Point No Point in Kitsap County and in South Puget Sound.

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.