A periwinkle snail climbed the wall of the aquarium, feasting on the algae that infests the glass.
Sitka periwinkle, Littorina sitkana. About 5 mm long. |
Usually, I clean up the background, removing algae spots and the scratches on the glass. I left them as is, this time; the algae is an essential part of the scene; it's the snail's dinner. And the scratches belong there, too. The snails make them, dragging their hard shells over the surface of the glass. Algae take advantage of them to grab a toehold.
Un caracolillo, Littorina sitkana, que mide más o menos 5 milímetros de largo, se ocupó en comer el alga que crece en la pared del aquario.
Normalmente, limpio la fotografía, borrando las manchas del alga y las rayaduras del vidrio. Hoy las dejé porque son un elemento esencial de la situación; el alga es la comida del caracol. Y las rayaduras las hacen los mismos caracoles, arrastrando sus conchas sobre el vidrio. Y esas grietitas les sirven al alga para fijarse a la pared.
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