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Analytical Systems, Electron Microscopes & Medical Systems


The smallest frog in the universe

The smallest frog in the universe

© Masamichi Shiono, Masako Nishimura (Hitachi High-Tech corporation)
© Rie Nakajima (Hitachi High-Tech Manufacturing & Service corporation)

The small frog was found in the electron microscope.
The true character of this frog is the fine structures on the cell wall of a diatom.
A portion of the face of this frog is the structure called rimoportula, and a portion of its legs is the structure called fultoportula. This frog was made combining two photographs taken separately. Inside these fine structures, the hole which pierces through the cell wall is open. Mucus and fibers are emitted through these holes from the cell, and have heightened lift.

At 64th photo contest hosted by the Japanese Society of Microscopy in 2008.


  • Specimen: The diatoms
  • Instrument: Scanning Electron Microscope SU-1500
  • Accelerating voltage: 15 kV
  • Signal: Secondary electron image
All information related to these photographers is based on the information when the photo was taken.
This work was presented at the "photo contest" hosted by the Japanese Society of Microscopy.
Reproduction or republication without permission prohibited.
"nanoart" is registered trademark of Hitachi High-Tech Corporation in Japan.