Ranitidine is a competitive, reversible inhibitor of the action of histamine at the histamine H2-receptors, including receptors on the gastric cells. Ranitidine does not lower serum Ca++ in hypercalcemic states. Ranitidine is not an anticholinergic agent.
1 The Blue Marlins have a diet of: Octopi, squid and pelagic fish such as black fin tuna and frigate mackerel.  They do prefer to hunt alone and during the day, rather than in schools, so it is safe to say they are a rather antisocial species.
A blue whale can eat up to 7,715 pounds of krill (small shrimp-like organisms) per day! BEHAVIOR: Blue whales swim 14 miles per hour (with bursts as fast as 30 mph) and feed at depths of less than 330 feet (but can dive. as deep as 1,640 feet).