While performing for a wedding reception at Mystic Marinelife Aquarium in Connecticut, the band Mariachi Connecticut took a break to serenade a beluga in its tank.

The beluga hangs out with the band for the whole song, bobbing up and down and pressing its head against the glass. That its face looks like a big contented grin doesn’t hurt either.

Watch the clip below, embedded via YouTube.

(H/T: Reddit)