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.
Young bluegill's diet consists of rotifers and waterfleas. The adult diet consists of aquatic insect larvae (mayflies,caddisflies, dragonflies) but can also include crayfish, leeches, snails, and other small fish. Their diet can also include the waxworm and nightcrawler that can be provided for them by anglers.