Many crabs camouflaged using surrounding objects, but the most original method chose the arthropods of the family Dromiidae.
May 6, 2019 at 09:11
The family Dromiidae has more than a hundred species, and all have a common trait: the use of the sponge (lat. Porifera) camouflage. Some of them simply put it’s a living creature on your armour, holding a pair of limbs; the other “grind” the sponge to the desired size and then placed on yourself.
Japanese scientists decided to study this process in more detail. For the experiment they selected 38 crabs Lauridromia dehaani, offering them an artificial sponge made of foamed melamine. The choice of material was influenced by its properties: it easily sinks in water and it easily out again.
Crabs sponges come: they first cut out your piece of the desired shape (it took about 50 minutes), and then another five hours were required to create the right grooves, perfect-fitting shell.
All these actions are the crabs done at night, perhaps to minimize attack by predators. Each animal had their own favorite technique and form for “hats”. However, all this have been done only in experimental size less than 9 cm; specimens larger than the sponges showed no interest.
On the basis of this observation, scientists have concluded that the sponge as suggested earlier, is used by the crab to protect it from enemies. However, this is true only for arthropods of young adults are themselves unable to fend for themselves.
Teilor Stone has been a reporter on the news desk since 2013. Before that she wrote about young adolescence and family dynamics for Styles and was the legal affairs correspondent for the Metro desk. Before joining The Bobr Times, Teilor Stone worked as a staff writer at the Village Voice and a freelancer for Newsday, The Wall Street Journal, GQ and Mirabella. To get in touch, contact me through my firstname.lastname@example.org 1-800-268-7116