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 Do Blue Ringed Octopuses Eat | Blue Ringed Octopus Facts. Blue ringed octopus usually hunts small animals during the day. They are known to take on squid, hermit crabs, shrimps, and lobster. When a prey is in its range, it will pounce on it while clasping it with its eight tentacles and paralyzing it with its venomous bite.