>>37923199The line represents sea lions performing with bubbles to gather attention. Primarina is a sea lion that performs with bubbles and gathers more attention due to the fact that it's pretty/feminine and it can control bubbles with beautiful singing, two aspects closely connected to mermaids.
Also, sailors described sea lions as mermaids which is how the myth started, so it has some veracity in the real world as well.
I think there are more minor connections like how sea lions bark incessantly and loudly and mermaids being famous for their singing but that's the gist of it.
