He – or she – is obviously a fan.

A dolphin kissed Mariah Carey and he liked it, squealing with delight as he swam away, in a heart-warming video the singing star posted on Instagram on Monday.

The 49-year-old obviously liked the experience too, as she couldn’t stop smiling as she floated in the Caribbean’s azure blue water off the coast of the island of Curacao.

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He kissed a girl: And Mariah Carey liked it, beaming with joy as the Coastal Bottlenose dolphin nuzzled her cheek  at the Dolphin Academy, Caracao, in the warm Caribbean waters

The With You singer was dressed in a wet suit and sunglasses with her blonde tresses tied back in a ponytail for her experience at the Dolphin Academy Caracao.

Unlike other aquariums, the Coastal Bottlenose dolphins at the academy are free to swim in a natural saltwater lagoon and the open sea.

But they seem to enjoy interacting with humans and were happy to swim back to the trainer’s boat demanding a treat every time they performed.

They’re both happy: The dolphin squealed with excitement as he swam away from the 49-year-old hitmaker who couldn’t wipe the smile off her face

Look at that smile: The marine mammal swam back to the trainer’s boat demanding a treat

Mariah was on the island, which is off the coast of Venezuela, to perform at Caracao’s North Sea Jazz Festival on Sunday.

And she shared a video on Instagram of the audience singing along to one of her hits.

She captioned it: ‘Loved singing HERO with these amazing fans at @curacaonorthseajazz.’

Kind experience: Unlike other aquariums, the Coastal Bottlenose dolphins at the academy are free to swim in a natural saltwater lagoon and the open sea

Dressed in rubber: Maria wore a wetsuit leaving the zip open to reveal her cleavage as she swam in the warm Caribbean

There was no sign of Mariah’s choreographer beau Bryan Tanaka, 36.

But he was probably there as they were seen leaving their Tribeca apartment in NYC with luggage on Thursday evening.

Her twins, Moroccan and Monroe, eight, also didn’t appear to be around. She shares them with her friendly ex-husband Nick Cannon.

Their hero: The crowd at at Caracao’s North Sea Jazz Festival sang along with Mariah on Hero