Cologne cam­ou­flage

Down to Earth - - COVER STORY -

not al­ways be vis­ual. File­fish use a cologne they pre­pare from the corals they eat to hide from the nose of preda­tors. A study in Australia found that crabs were un­able to smell file­fish be­cause they smelled like the corals. In­sects are known to use the tech­nique but this is the first time that a ver­te­brate has been found to use chem­i­cal cam­ou­flage. The find in­di­cates that there could be more species which use it. Pro­ceed­ings of the Royal So­ci­ety B, De­cem­ber 10

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