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.
What a sea turtle eats depends upon the species. Some are omnivores, eating a variety of plants and animals, while the hawksbill and the leatherback are specialists, subsisting primarily of sponges (hawksbills) and jellyfish (leatherbacks). Olive ridley: An omnivore, these turtles eat a variety of animals and plants including crabs, shrimp, lobster, urchins, jellies, algae, and fish.