Cnidaria is a phylum within Kingdom Animalia which consists of hydras, jellies (or jellyfish), sea anemones, and corals. All cnidarians are radially symmetrical, and there are two main radially symmetrical body types.
The stock market crash, on black Tuesday (October 29, 1929) began the Great Depression.
The stock market crash of 1929 marked the beginning of the Great  Depression. The stock market lost $30 billion in just two days,  October 28 and 29th. 1 person found this useful.