Eat yer slime, dang it. Starving children in, I dunno, New Guinea would LOVE to have that slime! Oh, wait, they eat people there, don't they? Never mind.
What is pictured would not be considered sushi. It is much closer to spam musubi. Spam musubi would be a layer of rice, a slice of spam, another layer of rice, and wrapped with seaweed. The example shown lacks the second layer of rice.