OCEAN OBSERVED

Compound eye of an Antarctic krill. Credit: Gerd Alberti and Uwe Kils, via Wikimedia Commons.

Scales on a 3-day old zebrafish. Credit: Carla Stehr, NOAA.

     Coccolithophore, Gephyrocapsa oceanica. Credit: NEON_ja via Wikimeda Commons.    

Diatoms. Credit: Carla Stehr, NOAA.

Gills of a mudskipper, Periophthalmus argentilineatus. Credit: G. Kruitwagen and H.P.M. Geurts, Radboud University Nijmegen.

Gills of a mudskipper, Periophthalmus argentilineatus. Credit: G. Kruitwagen and H.P.M. Geurts, Radboud University Nijmegen.

Suckers on a newly hatched east Pacific red octopus, Octopus rubescens. Credit: Carla Stehr, NOAA.

Dinoflagellate. Credit: Carla Stehr, NOAA.

All these images were taken with a scanning electron microscope. If you're wondering how that works, this video explains.