Aquarium guide
Aquarium guide     

  
 
SPONGES
 

SPONGES

Up until the 19th century, naturalists hesitated when classifying sponges: animal or vegetable? It must be admitted, however, that their field of research was extensive, as there are around 10,000 species of sponges.

SPONGES

These very old animals were among the first to appear on earth or, more exactly, in the sea. Freshwater species are rare and are not found in aquariums, but some marine species can be kept in captivity.


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СЕРАКОВСКИЙ Зыгмунт (1826-63) , капитан российского Генштаба. Сотрудник "Колокола" и "Современника". В 1857 организовал революционный кружок офицеров в Санкт-Петербурге. В 1863 руководитель восстания в Литве. Казнен.