Instinctive behavior occurs when an animal has a particular internal state while it is in the presence of a specific external stimulation called a releaser or a sign stimulus.
How many ships did the U-boats sink? During the war the U-boats sank about 2,779 ships for a total of 14.1 million tons GRT. This figure is roughly 70% of all allied shipping losses in all theatres of the war and to all hostile action. The most successful year was 1942 when over 6 million tons of shipping were sunk in the Atlantic.
The Japanese attack on Pearl Harbor in December (7th) of 1941  damaged dozens of ships and sunk quite a few others. The ships sunk  in the attack totaled 18, with 5 battleshâ¦ips included. Perhaps the  most famous victim of the attack was the U.S.S. Arizona, which  continues to serve as a national monument.