Angiotensin II is a potent vaso-active peptide that causes blood vessels to constrict, resulting in increased blood pressure. Angiotensin II also stimulates the secretion of the hormone aldosterone from the adrenal cortex. Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood.
The most reliable record of a Blue Shark at speed is 24.5 miles (39.4 kilometres) per hour for a 6.5-foot- (2-metre-) long individual. The Shortfin Mako (Isurus oxyrinchus) is probably the champion speedster among sharks.
Estimates of their speed varies; some say that they can swim at about 60 miles per hour, while more conservative estimates are about 22 mph. The blue shark's diet consists mostly of squid, but it will eat almost anything; it is an opportunistic feeder. This Hand Puppet is 24 inches long.