The calcareous skeleton of a common Sea Urchin shell, photographed in the studio. Coquille d'oursin photographiée en studio.
A lit from inside common Sea Urchin shell (Echinus esculentus), photographed in the studio. This calcareous external skeleton on which are articulated spines is called "test". The test itself is provided with a perforated plate-like structure: the madreporite, that forms the intake for its water-vascular system. Coquille d'oursin (Echinus esculentus) photographiée en studio. La coquille est éclairée de l'intérieur. Ce squelette calcaire sur lequel s'articulent les piquants s'appelle le test, son sommet est muni d'une plaque criblée de trous, bien visible ici et qui porte le nom de madréporite.
Size: 5620px × 3747px
Location: France
Photo credit: © Emmanuel LATTES / Alamy / Afripics
License: Royalty Free
Model Released: No
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