Katy Perry is selling a Super Bowl Left Shark onesie.

The 30-year-old singer was joined by backing dancers dressed as the killer fish, palm trees and beach balls for her rendition of California Gurls and Teenage Dream at her half-time show at the NFL final in February.

The dancing sharks attracted a lot of praise and attention on social media, and Perry is cashing in by releasing a "Left Shark belovesie" via her official online store.

The pop superstar has also released a T-shirt emblazoned with a Left Shark, with the words "Current Mood" emblazoned across the front and "Katy Perry" and "#leftshark# on the back.

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Following the reaction to the shark dancers in the wake of the Super Bowl show, Perry's boyfriend John Mayer claimed people said they liked the backing dancers because they were too embarrassed to admit her performance was "awesome".

He said: "I think the whole thing about the sharks, everybody wants to talk about the sharks because it's just something everyone can grab onto because not everyone feels comfortable walking around saying that Katy Perry was amazing."

- Bang! Showbiz