In a ancient days, it was common for Mom or Dad to ring a cooking bell when it was time to eat.
The kiddos were customarily off personification outside, and a cooking bell would call them home to food down together as a family. It’s left out of conform now for humans, though there’s one fish in a sea who knows accurately what happens when he hears that special sound.
The diver clearly loves this fish, and he comes swimming right away. How cute!