That is one giant wooden block your sushi is sitting on. Is it special Japanese cherry wood? What's that? It's a cake? Oh very well then, you may proceed with your revelry as planned.
Perfect for all your I-just-stuck-a-thing-on-my-head needs.
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?
Here's one goldfish in a bowl that NO ONE can call animal cruelty on.
You wanna see some seriously small food and how it's made? Feast your eyes.