Why the young crab is such a fashionable hat?

Зачем юному крабу такая модная шляпка?

Зачем юному крабу такая модная шляпка?

Зачем юному крабу такая модная шляпка?

Зачем юному крабу такая модная шляпка?

Why the young crab is such a fashionable hat?

Many crabs camouflaged using surrounding objects, but the most original method chose the arthropods of the family Dromiidae.

May 6, 2019 at 09:11

30

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.

Discover the secret of the crab-boxer.

Share Button