"Kame wa mannen"*

*Turtles live long

Concentric arrays of turtles appear to form spirals.

"Y-junction"

Concentric arrays of stars appear to be spirals. In addition, the figure appears to rotate counterclockwise (clockwise) when observers approach (leave) this figure with fixating at the center.

"Neural circuits"

Concentric arrays of stars appear to be spirals. In addition, the figure appears to rotate counterclockwise (clockwise) when observers approach (leave) this figure with fixating at the center.

"Tiger spiral"

Concentric circles appear to be spirals.

"Sitting-up all night"

Concentric red lines appear to be spirals. In addition, the left "eye" appears to rotate counterclockwise while the right one clockwise. Furthermore, both "eyes" appear to expand.

"Hatching"

Concentric arrays of dots appear to be spirals.

"Songs of frogs"

Concentric arrays of dots appear to be spirals.

"Primrose's spirals"

Concentric arrays of "flowers" appear to be spirals.

"Blizzard"

Concentric arrays of dots appear to form a spiral.

"Kaminari-san"*

*God of thunder

Concentric gray lines appear to be spirals.

"Candy"

Concentric gray lines appear to be spirals.

"Uzumaki ampan"

Concentric gray circles appear to be spirals.

"Air mail spirals"

Concentric rows appear to be spirals.

"Frog eggs"

Concentric rings appear to be spirals.

"DNA"

Concentric gray lines appear to be spirals.

"Deep sea"

Concentric arrays appear to be a spiral.

"A blood vessel"

Radial arrays of dots appear to be distorted.

"Italian spiral"

Concentric arrays of rectangles appear to form a spiral.

"Hurricane"

The concentric gray lines appear to be spirals.