I don't have a source for these so I can't say if they're candy or cakes or what but I do know they're not fish. Any guesses as to what is hidden inside?
Who doesn't love a surprise in their treats? Of course, when that surprise is a happy treat itself, not, like, a worm or something. Finding a heart in your cupcake is like finding a love note. It makes you feel special to know that someone cares enough to make a gesture.