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.
Significant events of the Great Depression started on Black Thursday, October 24, 1929. On that day, nearly 13 million shares of stocks were traded. It was a record number of stock trades for the United States. Mr. J.P. Morgan and a few other bankers attempted to bail out the banking system using their own money.