ナショナルジオグラフィックのインスタグラム(natgeo) - 10月15日 11時30分

Photograph by @Thomas Peschak Two tiger sharks swim in midwater through South Africa's Aliwal Shoal Marine Protected Area. This was once THE global tiger shark encounter hotspot, but in recent years sightings have declined. The exact cause is unclear but potential competition with the now super abundant and bolder blacktip sharks is often cited as one of the reasons. Unpublished image from my @ナショナルジオグラフィック story on marine reserves. #southafrica #sharks #aliwalshoal @thephotosociety @natgeocreative

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