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Bilateral symmetry in the drawings on the back of a ray, at the aquarium of Genoa.
Calcareous techas of echinoderm made of a set of calcareous plates that form a kind of sti...
A symmetry of type D4 on the umbrellas of these young medusae, photographed at the Aquariu...
Calcareous techas of echinoderm made of a set of calcareous plates that form a kind of sti...
Quattro fenicotteri caraibici e le loro immagini riflesse nell'acqua presso i Jardines del...
The spirals we see in a shell are logarithmic spirals, different from archimedean spirals,...
