Inside this aquarium is another aquarium, inside of which ferns grow.
Resident fish can swim up to the top of the ferns, but no further, as there's a bubble of air inside this little balloon.
Haruka Misawa, a Japanese designer, calls her series of surreal aquariums "Waterscape."
They all upend your sense of direction and normality. The fish tank isn't just a place to live, but a trip into a wonderland. You can see more photos at Spoon & Tamago.