Gessica Notaro, 28, said that she was doing so to encourage other women to fight back against bullying.
She posted a picture of herself on social media with sea lions at the aquarium where she works in east Italy.
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Her former boyfriend is being prosecuted over the attack but denies any involvement.
Ms Notaro is scheduled to host the aquarium's night-time performances later this year at the Adriatic resort of Rimini.
She was in danger of losing the sight in her left eye in the aftermath of the attack. Ms Notaro has had several operations since, and her injured eye remains bandaged. In a Facebook post she said: "My strength? Here it is," as she touched a sea lion.
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Ms Notaro's story caught the public imagination when she revealed her suffering on social media.
In April she went on national TV to denounce former boyfriend Jorge Edson Tavares.
"I want you to see what he did to me. This isn't love," she said.
"While the acid ate away at my face I was on my knees praying to God to take away my beauty but at least leave me with my sight."
Ms Notaro broke up with Mr Tavares last summer.
After she went to police to complain that she was being stalked, a restraint order was imposed on him.
On 10 January the former finalist was doused in hydrochloric acid by a man she identified as Mr Tavares.
He has strenuously denied any involvement in the attack.
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