What is the name of the popular animatronic singing fish prop, singing such hits such as "Don't Worry, Be Happy"?

The story behind the answer

The plaque-mounted animatronic fish that sings “Don’t Worry, Be Happy” is Big Mouth Billy Bass. Released by Gemmy Industries around 1999–2000, it became a pop-culture fad for its motion-activated routine: the fish swivels its head and flops its tail while performing that song and “Take Me to the River.”

It sold millions, appeared in TV shows and offices, and epitomized late-’90s novelty tech. To remember the name: “Big Mouth” hints at the singing gimmick, while “Billy Bass” uses alliteration and the term “bass” for the fish. The combo makes “Big Mouth Billy Bass”