Deutsch: Das Bild zeigt einen Rückenschwimmer unter Wasser. Der silbrige Glanz ist auf die Lichtreflexion an der Grenzfläche zwischen der von den Deckflügeln gehaltenen Luftschicht und dem umgebenden Wasser zurückzuführen.
English: This picture shows a submerged backswimmer. The silvery shine is caused by light reflection at the interface of the air layer kept by the elytron and the surrounding water.
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