On the heels of the mermaid tail blanket craze it seems that this Grandma went for a similar design, but instead of a mermaid tail she designed a Shark tail for the bottom, a Shark head as the opening, and a Shark fin - obviously a necessary part of a shark's anatomy - which resembled something slightly different because of where it falls when the child is wearing the blanket.
The kid's face in the photo really says it all. Oh well, grandma did her best, right?