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.
Blue crabs are both predator and prey in the benthic and planktonic food webs. of the Chesapeake Bay . In their post-larval and juvenile stages crabs provide food. for eel, drum, spot, Atlantic croaker, striped bass, sea trout and catfish.